Contents
About This Watch
General Guide
Watch Face Items
Navigating Between Modes
Mode Overview
Using the Crown
Hand and Day Indicator Movement
Charging
Viewing the Face in the Dark
Useful Features
Linking with a Phone
Getting Ready
Auto Time Correction
Configuring World Time Settings
Setting the Alarm
Configuring Timer Settings
Correcting Hand and Day Indicator Alignment
Phone Finder
Configuring Watch Settings
Changing the Home City Summer Time Setting
Checking the Watch Charge Level
Recording Your Current Location
(TIME&PLACE)
Connection
Connecting with a Phone
Disconnecting from Your Phone
Using the Watch in a Medical Facility or
Aircraft
Unpairing
If you purchase another phone
Time Adjustment
Time Adjustment Using a Time Signal
Overview
Appropriate Signal Reception Location
Time Signal Reception Ranges
Auto Time Calibration Signal Receive
Manual Time Calibration Signal Receive
Signal Reception Precautions
Using Watch Operations to Correct the Time
Setting
Checking the Last Time Correction Result
Using the Watch in a Medical Facility or
Aircraft
World Time
Using the CASIO WATCHES Phone App to
Configure World Time City Settings
Specifying a World Time City
Configuring the Summer Time Setting (World
Time)
Swapping Your Home City Time and World
Time
Moving Between Time Zones
Alarm
Using the CASIO WATCHES Phone App to
Configure Alarm Settings
Configuring Alarm Settings
Turning Off the Alarm
Stopwatch
Measuring Elapsed Time
Timer
Using the CASIO WATCHES Phone App to
Configure Timer Settings
Setting the Timer Start Time
Using the Timer
Hand and Day Indicator
Alignment
Using the CASIO WATCHES Phone App to
Adjust Hand and Day Indicator Alignment
Adjusting Hand and Day Indicator Alignment
Other Settings
Resetting Watch Settings
Specifications
Other Information
City Table
Summer Time Table
Supported Phones
Copyrights and Registered Copyrights
Troubleshooting
Precautions
Operating Precautions
User Maintenance
Battery
Mobile Link Precautions
Watch Operation Guide 5743
1
MA2504-EA
OPUM-J
© 2025 CASIO COMPUTER CO., LTD.
Published: 4/2025
About This Watch
This section provides an overview of the watch
and introduces convenient ways it can be
used.
Watch Features
●
Phone Linking
The watch supports connection and
communication with a Bluetooth capable
phone.
●
Solar Charging
Sunlight and artificial light generate
electricity for watch operation as it charges.
●
Time Signal Reception
The watch receives a radio signal
containing time information and uses it to
keep its time setting accurate.
●
World Time
Displays the current time in any one of 27
cities (38 time zones) around the globe and
UTC.
●
Alarm
A beeper sounds when the alarm time you
set is reached.
●
Stopwatch
You can use the stopwatch to measure up
to 24 hours of elapsed time in 1-second
units.
●
Timer
Countdown from a start time specified by
you. An alarm sounds when the countdown
reaches zero.
Note
●
The illustrations included in this
operation guide have been created to
facilitate explanation. An illustration
may differ somewhat from the item it
represents.
General Guide
30
②③ ④
⑥⑤
①
⑦⑧⑨
⑩
A 24-hour hand
B Hour hand
C Minute hand
D Crown
E Mode hand
F Second hand
G Small 24-hour hand
H Day indicator
I Small hour hand
J Small minute hand
A button
In the Calendar Mode or Alarm Mode, press
this button to illuminate the face.
B button
Pressing this button causes the second hand
to indicate the last receive operation result.
C button
Each press cycles between watch modes.
Holding down this button for at least one
second in any mode enters the Calendar
Mode.
Watch Face Items
②
①
③
④
⑧
⑦
⑩
⑨
⑤
⑥
A [C]
The second hand will point to [C] if the
watch is connected with a phone.
B [RC]
The second hand points to this mark while
calibration signal reception is in progress.
C Alarm on/off setting
In the Alarm Mode, the second hand
indicates if the alarm is enabled or
disabled.
[ON]: Alarm enabled
[OFF]: Alarm disabled
D Last receive result/Auto time correction
setting
The second hand points to [Y(YES)] or
[N(NO)] to indicate the result of the last
auto time correction operation based on
time signal reception or connection with a
phone.
[Y(YES)]: Auto time correction successful
[N(NO)]: Auto time correction failed
The second hand indicates whether auto
time correction is enabled or disabled.
[Y(YES)]: Auto time correction enabled
[N(NO)]: Auto time correction disabled
Watch Operation Guide 5743
2
E Battery level
The battery level is indicated by the mode
hand after you enter the Calendar Mode.
F Summer time setting
The mode hand points to the current
summer time setting.
G Day of week
In the Calendar Mode, the mode hand
points to the day of the week in the Home
City.
H [ST]
In the Stopwatch Mode, the mode hand
points to [ST].
I [TR]
In the Timer Mode, the mode hand points
to [TR].
J [AL]
In the Alarm Mode, the mode hand points
to [AL].
Navigating Between Modes
Each press of (C) cycles between watch
modes.
●
Hold down (C) for at least one second to
enter the Calendar Mode.
30
Calendar Mode
Timer Mode
Stopwatch ModeAlarm Mode
CC
CC
●
After you enter the Calendar Mode, the
mode hand first indicates the battery charge
level and then the current day of the week.
Mode hand
Charge level Day of week
●
Connecting with a Paired Phone
Hold down (C) for at least 2.5 seconds to
connect with a phone.
●
To disconnect, press any button.
30
30
C
Any button
Before connection After connection
Mode Overview
●
Calendar Mode
The main hour, minute, and second hands
indicate the current time.
The small hour and minute hands indicate the
current World Time.
30
① ②
③
⑤
④
Illumination
A Day of the week at current location
B Current location 24-hour time
One revolution every 24 hours.
C Current location seconds
D World Time
E World Time 24-hour time
The hand points to the A-side for a.m.
times, and to the P-side for p.m. times.
Swapping the Current Location Time and
World Time
Hold down (A) for at least three seconds.
Time Adjustment Using a Time Calibration
Signal
Hold down (B) for at least 0.5 seconds until the
second hand points to [RC].
●
A manual time calibration signal receive
operation cannot be performed while the
watch is paired with a phone.
Connecting with a Paired Phone to
Correct the Watch’s Time
Hold down (B) for at least 0.5 seconds until the
second hand points to [C].
Searching for a Paired Phone
Hold down (B) for at least 3.5 seconds until the
second hand points to [C].
Watch Operation Guide 5743
3
●
Stopwatch Mode
The main hour and minute hands indicate the
current time.
The second hand, and the small hour and
minute hands indicate the elapsed stopwatch
time.
30
①
④
②
③
Split/reset
Start/Stop
A Stopwatch seconds
B Stopwatch minutes
C Stopwatch hours
D Stopwatch 24-hour hand
The hand points to the A-side for hours 0
through 11, and to the P-side for hours 12
through 23.
●
Timer Mode
The main hour and minute hands indicate the
current time.
The second hand, and the small hour and
minute hands indicate the current countdown
time.
30
①
④
③
②
Reset
Start/Stop
A Timer seconds
B Timer minutes
C Timer hours
D Timer 24-hour hand
The hand points to the A-side for hours 0
through 11, and to the P-side for hours 12
through 23.
●
Alarm Mode
The main hour and minute hands indicate the
current time.
The small hour and minute hands indicate the
alarm time.
30
①
③
②
Enabling/
Disabling the
Alarm
Illumination
A Alarm enabled/disabled
B Alarm time
C Alarm 24-hour hand
The hand points to the A-side for a.m.
times, and to the P-side for p.m. times.
Watch Operation Guide 5743
4
Using the Crown
The watch’s crown is a screw-in (screw lock)
type. To use the crown, you first need to rotate
it towards you (leftwards) to loosen it.
Loosen
Crown
Important!
●
To prevent loss of water resistance
and/or damage due to impact, be sure
to screw the crown in by rotating it
away from you as you push it in.
Screw in
●
When pushing the crown back in, take
care not to apply too much force.
●
Fast Forward/Fast Reverse
Second click
First click
Normal timekeeping
Crown
After pulling out the crown to the first or second
click, rotating it quickly in succession in either
direction will start a fast forward or fast reverse
operation. While a fast forward operation is in
progress, quickly rotating the crown in
succession again will increase the speed even
further.
●
Stopping Fast Forward/Fast Reverse
Rotate the crown in the direction opposite that
of the ongoing operation or press any button.
Note
●
If you do not perform any operation for
about two minutes after pulling out the
crown, crown operations will
automatically become disabled. If that
happens, push the crown back in and
then pull it out again.
Hand and Day Indicator
Movement
30
Mode hand
Day indicator
●
Mode Hand and Day Indicator
Movement
Changing the day setting of the watch will also
cause the mode hand to move.
●
Day
●
It can take anywhere from about 10 to 40
seconds for the day indicator to change
after timekeeping reaches midnight. The
mode hand moves as the day indicator
changes.
●
The day may not be indicated correctly
while the watch’s crown is pulled out.
Charging
This watch runs on power supplied from a
rechargeable (secondary) battery that is
charged by a solar panel. The solar panel is
integrated into the face of the watch, and
power is generated whenever the face is
exposed to light.
●
Charging the Watch
When you are not wearing the watch, put it in
a location where it is exposed to bright light.
While you are wearing the watch, make sure
that its face (solar panel) is not blocked from
light by the sleeve of your clothing. Power
generation efficiency is reduced even when
the face of the watch is blocked only partially.
NOYES
Important!
●
Some light sources and environments
can cause the watch to become
extremely hot during charging, which
creates the risk of burn injury and
damage to internal watch
components.
Avoid charging the watch under
conditions like the ones described
below, where the temperatures may
exceed 60 °C (140 °F).
ー
On the dashboard of a vehicle
parked in the sun
ー
Near incandescent lamps, camera
lights, halogen lamps, or other
sources of heat
ー
In locations exposed to direct
sunlight for long periods and other
hot locations
Watch Operation Guide 5743
5
●
Checking the Charge Level
Immediately after you press (C) to return to the
Calendar Mode, the mode hand will indicate
the battery charge level. After a short while,
the mode hand will indicate the current day of
the week.
30
③
②
①
A Low Battery
B Good (medium charge)
C Good (high charge)
●
Remaining Charge and Dead Battery
You can determine if the charge level is low by
checking the hand movement. Functions
become disabled as battery power goes low.
Important!
●
Should the battery go low or go dead,
expose the face (solar panel) to light as
soon as possible.
Note
●
Exposing the watch face to light after
the battery goes dead will cause the
second hand to revolve
counterclockwise until it stops at
second 57. This indicates charging
has started.
Low Battery Power
The second hand jumps at two-second
intervals.
30
Second hand
Dead Battery
All hands and the day indicator are stopped.
1
●
Charging Time Guidelines
The table below shows guidelines for
approximate charging times.
Charging Times Required for 1 Day of
Operation
Light Level (Lux)
Approximate
Charging Time
50,000 8 minutes
10,000 30 minutes
5,000 48 minutes
500 8 hours
Charge Recovery Times
●
Sunny day, outdoors (50,000 lux)
Dead battery
n
Medium
charge
2 hours
Medium charge
n
High
charge
17 hours
High charge
n
Full charge
5 hours
●
Sunny day, near a window (10,000 lux)
Dead battery
n
Medium
charge
5 hours
Medium charge
n
High
charge
63 hours
High charge
n
Full charge
17 hours
●
Overcast day, near a window (5,000 lux)
Dead battery
n
Medium
charge
8 hours
Medium charge
n
High
charge
102 hours
High charge
n
Full charge
28 hours
●
Indoor fluorescent lighting (500 lux)
Dead battery
n
Medium
charge
90 hours
Medium charge
n
High
charge
-
High charge
n
Full charge
-
Note
●
Actual charging time depends on the
charging environment, watch settings,
and other factors.
Watch Operation Guide 5743
6
●
Power Saving
Leaving the watch in a dark location for about
one hour between the hours of 10 p.m. and
5:50 a.m. will cause the second hand to stop,
and the watch to enter Level 1 power saving.
If the watch is left in this condition for six or
seven days, all hands will stop at 12 o’clock
and the watch will enter Level 2 power saving.
Level 1 :
Second hand stops to save power.
Level 2 :
The following operations are stopped to save
power: all hand movement (excluding the day
indicator), Bluetooth connection, and alarm
alerts.
Note
●
Note that the watch also may enter the
power saving state if its face is blocked
from light by your sleeve while you are
wearing it.
●
The watch will enter power saving from
the Calendar Mode only.
Recovering from Power Saving Operation
Use one of the operations below to exit power
saving.
●
Press any button.
●
Pull out the crown.
●
Move the watch to a bright location.
Viewing the Face in the Dark
The watch has an LED light that you can use
to illuminate the display for about 1.5 seconds
for viewing in the dark. When turned on,
illumination becomes gradually brighter and
then gradually dimmer.
Illumination can be used in the Calendar Mode
and Alarm Mode.
●
Turning On Illumination
Press (A) to illuminate the face of the watch.
30
●
Illumination turns off automatically if an
alarm starts to sound.
●
Illumination is disabled while the hands are
moving at high speed.
Useful Features
Pairing the watch with your phone makes a
number of the watch’s features easier to use.
Auto time correction
l
Auto Time Correction
12:30
Selection of More Than 300 World Time
cities
l
Configuring World Time Settings
In addition, a number of other watch settings
can be configured using your phone.
To transfer data to a watch and to
configure settings, you first need to pair
the watch with your phone.
l
Getting Ready
●
Your phone needs to have the “CASIO
WATCHES” phone app installed to pair with
the watch.
Watch Operation Guide 5743
7
Linking with a Phone
While there is a Bluetooth connection
between the watch and phone (Mobile Link),
the watch’s current time setting is corrected
automatically. You can also change the
watch’s other settings.
Note
●
This function is available only while the
CASIO WATCHES phone app is
running on the phone.
●
This section describes watch and
phone operations.
X
: Watch operation
Y
: Phone operation
Getting Ready
To use your watch in combination with a
phone, you first need to pair them. Perform the
steps below to pair the watch with a phone.
A
Install the app on your phone.
B
Configure Bluetooth settings.
C
Pair the watch with a phone.
●
A
Install the required app on your
phone.
In Google Play or the App Store, search for the
“CASIO WATCHES” phone app and install it
on your phone.
●
B
Configure Bluetooth settings.
Enable the phone’s Bluetooth.
Note
●
For details about setting procedures,
see your phone documentation.
●
C
Pair the watch with a phone.
1. Move the phone to be paired with close to
(within one meter of) the watch.
2.
Y
Tap the “CASIO WATCHES” icon.
3.
Y
Tap the of the “My Watch” tab.
4.
Y
Perform the operation shown on the
phone screen to register the watch to the
CASIO WATCHES phone app.
5.
X
Hold down (C) for at least 2.5 seconds
until the second hand points to [C].
When a connection is established
between the watch and phone, the
second hand moves to [C].
At this time the time settings of your phone
and watch are synced with each other.
●
If pairing fails, the watch returns to the
state it was in before starting this
procedure. Perform the pairing
procedure again from the beginning.
This completes the pairing operation.
Once paired, the smartphone and watch
automatically connect to synchronize the
watch’s time setting with that of the
smartphone.
Note
●
The first time you start up the CASIO
WATCHES phone app, a message will
appear on your phone asking if you
want to enable location information
acquisition. Configure settings to allow
background use of location
information.
Auto Time Correction
Your watch connects with a phone at preset
times each day and correct its time settings
automatically.
●
Using This Function
Your watch adjusts its time setting four times
a day according to a preset schedule. If you
leave the watch in the Calendar Mode, it will
perform the adjustment operation
automatically as you go about your daily life
(as shown in the illustration), without any
operation required by you.
12:30
Important!
●
Note that the watch will not perform
auto time correction if it enters the
Calendar Mode while any one of the
conditions below exists.
ー
Battery power is low.
ー
Watch is in Level 2 power saving.
ー
While the watch is too far away from
its paired phone
ー
While communication is not possible
due to radio interference, etc.
ー
While the phone is updating its
system
ー
While the CASIO WATCHES phone
app is not running on the phone
Watch Operation Guide 5743
8
Note
●
If the watch does not indicate the
correct time even if is able to connect
with a phone, correct the hand and
date indicator positions.
l
Correcting Hand and Day
Indicator Alignment
●
If there is a World Time City specified
with the CASIO WATCHES phone
app, its time will also be synchronized
automatically.
●
The watch connects with the phone
and performs auto time correction at
around 12:30 a.m., 6:30 a.m., 12:30
p.m. and 6:30 p.m. The connection is
automatically terminated after auto
time correction is complete.
●
Triggering Immediate Time Correction
The watch’s time setting is corrected
automatically whenever you establish a
connection between the watch and a phone.
Whenever you want to trigger immediate time
correction, perform the procedure below to
connect with a phone.
1. Move the phone close to (within one meter
of) the watch.
2.
X
Hold down (B) for at least 0.5 seconds
until the second hand points to [C].
Release the button as soon as the second
hand points to [C].
When the watch connects with a phone,
the second hand performs one revolution
and then points to [C] again. Next, the
watch’s time setting is adjusted to that of
the phone.
●
At this time your current location is
recorded by your phone.
●
The connection is terminated
automatically after time correction is
complete.
30
Configuring World Time
Settings
Specifying a World Time City with the CASIO
WATCHES phone app causes the watch’s
World Time City to change accordingly. The
standard time/summer time setting of the
World Time will be corrected automatically
without any watch operation required by you.
Note
●
The CASIO WATCHES phone app
World Time lets you select from among
approximately 300 cities as the World
Time City.
●
To select a World Time City
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen. The World Time setting will
be reflected on the watch.
The dial small hour hand and small minute
hands, and the small 24-hour hand
indicate the current time in the selected
city.
●
You can determine whether a World
Time is a.m. or p.m. by checking the
position of the small 24-hour hand.
30
World Time hour (24-hour)
World Time hour and minute
Watch Operation Guide 5743
9
●
Configuring the Summer Time Setting
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen to select a summer time
setting.
●
“Auto”
The watch switches between standard
time and summer time automatically.
●
“OFF”
The watch always indicates standard
time.
●
“ON”
The watch always indicates summer
time.
Note
●
While the summer time setting is
“Auto”, the watch switches between
standard time and summer time
automatically. You do not need to
switch between standard time and
summer time manually. Even if you are
in an area that does not observe
summer time, you can leave the
watch’s summer time setting as “Auto”.
●
Changing the time setting manually
with a watch operation will cancel auto
standard time/summer time switching.
●
The CASIO WATCHES phone app
screen shows information about
summer time periods.
●
Swapping Your World Time and Home
Time
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen to swap your Home Time
with your World Time.
For example, if your Home City is Tokyo
and the World Time City is New York, they
will be swapped as shown below.
30
30
Home City (Tokyo)
Before swapping After swapping
Home City (New York)
World Time City
(New York)
World Time City
(New York)
Note
●
Auto time correction does not work for
24 hours after swapping the Home
Time and World Time.
Setting the Alarm
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen to configure alarm time
settings.
Configuring Timer Settings
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen to configure the timer time
setting.
Watch Operation Guide 5743
10
Correcting Hand and Day
Indicator Alignment
If the hands and/or day indicator are out of
alignment even though auto time correction is
being performed, you can use the CASIO
WATCHES phone app to adjust them.
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen to correct hand and day
indicator alignment.
Phone Finder
You can use phone finder to trigger a tone on
the phone to make it easy to find. The tone is
forced to sound even if the phone is in vibrate
mode.
Important!
●
Phone finder will not sound the tone
unless the CASIO WATCHES phone
app is running on the phone.
●
Do not use this function in areas where
phone call tones are restricted.
●
The tone sounds at a high volume. Do
not use this function when listening to
phone output over earphones.
1.
X
If the watch is connected with a phone,
press any button to terminate the
connection.
30
30
DisconnectedConnected
2.
X
Hold down (B) for at least 3.5 seconds
until the second hand points to [C].
A connection will be established between
the watch and phone, and then the
phone’s ringtone will sound.
●
It takes a few seconds before the phone
tone sounds.
3.
X
Press any button to stop the tone.
●
You can press any watch button to stop
the phone tone, but only during the first
30 seconds after it starts to sound.
Configuring Watch Settings
After establishing a connection between the
watch and a phone, you can use the CASIO
WATCHES phone app to configure watch
settings and to view information acquired by
the watch.
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Select the setting you want to change
and then perform the operation shown on
the phone screen.
Changing the Home City
Summer Time Setting
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen to change your Home City
summer time setting.
Watch Operation Guide 5743
11
Checking the Watch Charge
Level
Use the procedure below to check the current
charge level with the CASIO WATCHES
phone app.
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Use the CASIO WATCHES phone app
to check the charge level.
Recording Your Current
Location (TIME&PLACE)
While traveling or otherwise on the go, you can
use the procedure below to record your
current location, along with the time and date,
on your phone. Recorded location information
can be viewed on the CASIO WATCHES
phone app map.
●
Recording Your Current Location
1.
X
Enter the Calendar Mode.
l
Navigating Between Modes
2.
X
Hold down (B) for at least 0.5 seconds
until the second hand points to [C].
Release the button as soon as the second
hand points to [C].
This records, in phone memory, the
latitude and longitude of the location you
are in when you press (C), along with the
date and time of the recording.
●
When location recording is successful,
the second hand performs one
revolution and then points to [C] again.
Next, watch syncs its time setting with
your phone.
●
Viewing a Recorded Location on a Map
1.
Y
Tap the “CASIO WATCHES” icon.
2.
Y
Perform the operation shown on the
phone screen to view recorded location
information.
Note
●
You can use the CASIO WATCHES
phone app to delete recorded location
information.
Connection
Connecting with a Phone
Your watch can connect with a phone that is
paired with it.
●
If the watch is not paired with the phone you
want to connect with, refer to the information
below and pair them.
l
C
Pair the watch with a phone.
●
Connecting with a Phone
1. Move the phone close to (within one meter
of) the watch.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
Important!
●
If you have problems establishing a
connection, it could mean that the
CASIO WATCHES phone app is not
running on your phone. On your
phone’s home screen, tap the “CASIO
WATCHES” icon. After the app starts
up, hold down the watch’s (C) button
for at least 2.5 seconds.
Note
●
The connection is terminated if you do
not perform any operation on the watch
or phone for a fixed amount of time.
To specify the connection limit time,
perform the following operation with
the CASIO WATCHES phone app:
“Watch settings”
n
“Connection time
with the app”. Next, select a setting of
3 minutes, 5 minutes, or 10 minutes.
Watch Operation Guide 5743
12
Disconnecting from Your Phone
Pressing any button terminates the Bluetooth
connection and returns the second hand to its
normal operation.
30
30
DisconnectedConnected
Using the Watch in a Medical Facility
or Aircraft
Whenever you are in a hospital, on an aircraft,
or in any other location where auto time
calibration signal receive or connection with a
phone may cause problems, you can perform
the procedure below to disable auto time
correction. To re-enable auto time correction,
perform the same operation again.
1.
Y
Tap the “CASIO WATCHES” icon.
2.
X
Hold down (C) for at least 2.5 seconds.
This establishes a connection between
the watch and phone.
3.
Y
Perform the operation shown on the
phone screen to enable or disable auto
time correction.
Unpairing
Unpairing the watch from a phone requires
both the CASIO WATCHES phone app and
watch operations.
●
Deleting Pairing Information from the
CASIO WATCHES phone app
1.
X
If the watch is connected with a phone,
press any button to terminate the
connection.
30
30
DisconnectedConnected
2.
Y
Tap the “CASIO WATCHES” icon.
3.
Y
Perform the operation shown on the
phone screen to unpair.
●
Deleting Pairing Information from the
Watch
1.
X
Pull out the crown to the second click.
2.
X
Hold down (B) for at least 10 seconds.
This deletes the pairing information. The
second hand will point to [C].
Crown
3.
X
Push the crown back in.
If you purchase another phone
You need to perform the pairing operation
whenever you want to establish a Bluetooth
connection with a phone for the first time.
l
Deleting Pairing Information from the
Watch
l
C
Pair the watch with a phone.
Time Adjustment
Your watch can obtain date and time
information by connecting with a phone and by
receiving time signals, which it uses to adjust
its settings.
Important!
●
Disable auto time correction whenever
you are inside an aircraft or in any other
area where radio wave reception is
prohibited or restricted.
l
Using the CASIO WATCHES
Phone App to Configure Settings
l
Using Watch Operations to
Configure Settings
Watch Operation Guide 5743
13
Referring to the information below, configure
the time setting in accordance with the method
that suits your own lifestyle.
Do you use a phone?
Time correction by connecting with your
phone is recommended.
l
Auto Time Correction
12:30
Can you receive a time signal in your area?
If you are able to receive a time signal,
time settings can be adjusted in
accordance with a received signal.
l
Time Signal Reception Ranges
l
Setting a Home City
Other than the above.
If you are unable to connect with a phone
and are unable to receive a time signal,
you can perform watch button operations
to adjust its time setting.
l
Using Watch Operations to Correct the
Time Setting
Time Adjustment Using a
Time Signal
Overview
The watch’s time and day settings can be
configured in accordance with a received time
calibration signal.
Important!
●
In order to make it possible for the
current time setting to be adjusted
correctly based on time calibration
signal reception, you need to specify
the time zone where you are using the
watch.
●
If the watch was unable to connect with
a phone even once for time correction
during the previous day while
connection with a phone is being used,
it will automatically try to receive a time
calibration signal.
●
Disable auto time correction whenever
you are inside an aircraft or in any other
area where radio wave reception is
prohibited or restricted.
l
Using the CASIO WATCHES
Phone App to Configure Settings
l
Using Watch Operations to
Configure Settings
Note
●
Areas where time calibration signal
reception is supported are limited.
When the watch is in an area where
time calibration signal reception is not
possible, connect with a phone to
adjust time and day settings.
l
Time Signal Reception Ranges
●
If the watch does not indicate the
correct time even after it receives a
time calibration signal, correct the
hand and day indicator positions.
l
Using CASIO WATCHES to Adjust
Alignment
l
Using Watch Operations to
Correct Hand Positions
Appropriate Signal Reception
Location
A time calibration signal can be received while
the watch is near a window.
●
Position the watch so its 12 o’clock side is
facing the window.
●
Keep metal objects away from the watch.
●
Do not move the watch.
●
Do not perform any operation on the watch.
12 o'clock
Note
●
You may experience time calibration
signal reception problems in the areas
described below.
ー
Among or near buildings
ー
While riding in a vehicle
ー
Near household appliances, office
machines, mobile phones, etc.
ー
On a construction site, in an airport,
or any other location where radio
wave interference occurs
ー
Near high-voltage lines
ー
In mountainous areas or behind a
mountain
Watch Operation Guide 5743
14
Time Signal Reception Ranges
●
Japan (JJY)
The Japan time signal radio stations are
located on Mt. Otakadoya in Fukushima and
Mt. Hagane in Fukuoka/Saga.
The reception range of the Japanese time
signals is approximately 1,000 km from each
transmission station.
●
China (BPC)
The China time signal radio station is located
in Shangqiu, Henan Province, China.
The reception range of the Chinese time
signal is approximately 1,500 km from the
transmission station.
●
United States (WWVB)
The United States time signal radio station is
located in Fort Collins, Colorado.
The reception range of the U.S. time signal is
approximately 3,000 km from the transmission
station.
●
U.K. (MSF)/Germany (DCF77)
The U.K. time signal radio station is located in
Anthorn, Cumbria.
The German time signal radio station is
located in Mainflingen, southeast of Frankfurt.
The reception range of the U.K. and German
time signals is approximately 1,500 km from
each transmission station.
Note
●
Even if you are within the normal
reception range of a time calibration
signal, reception may be made
impossible by the following factors:
geographic contours, weather, the
season, the time of day, wireless
noise.
Auto Time Calibration Signal
Receive
An automatic time calibration signal receive
operation is performed and the time and day
settings are corrected between midnight and
5:00 a.m. Once a signal receive operation is
successful, no more auto receive operations
are performed that day.
Getting Ready
Enter the Calendar Mode.
l
Navigating Between Modes
Place the watch near a window or some other
location appropriate for signal reception.
●
The second hand points to [RC] while the
receive operation in progress.
●
When the receive operation is successful,
the time and day settings will be adjusted
automatically.
Note
●
Reception takes anywhere from about
two minutes to about 10 minutes. It can
take as long as 20 minutes.
●
If the watch connects with a phone and
adjusts its time setting, the watch will
not perform auto receive of a time
calibration signal for the rest of that day
or the next day.
Manual Time Calibration Signal
Receive
1. Place the watch near a window or some
other location appropriate for time signal
reception.
2. Enter the Calendar Mode.
l
Navigating Between Modes
3. Hold down (B) for at least 0.5 seconds until
the second hand points to [RC].
This indicates that the receive operation
has started. After the receive operation is
complete, the watch’s time and day
settings will be corrected accordingly.
30
Note
●
The receive operation takes anywhere
from about two minutes to about 10
minutes. It can take as long as 20
minutes.
●
Time calibration signal reception is
better at night than during the day.
●
A time calibration signal cannot be
received while the watch is paired with
a phone.
Watch Operation Guide 5743
15
Signal Reception Precautions
●
When the watch is unable to correct its time
in accordance with a calibration signal for
some reason, average timekeeping
accuracy is within ±15 seconds per month.
●
Note that an internal decoding process the
watch performs after it receives a signal
may cause the time setting to be slightly off
(by less than one second).
●
Time calibration signal reception is not
possible under the conditions described
below.
ー
While battery power is low
ー
In any mode besides the Calendar Mode
ー
At Power Saving Level 2
ー
While the crown is pulled out
ー
While the Home City setting is a time zone
where time signal reception is not
possible
ー
While the watch is outside the time signal
reception range
ー
While the watch is paired with a phone
●
To perform a manual time calibration signal
receive operation, make sure the watch is
not paired with a phone. If it is, delete the
watch’s pairing information before
performing the manual receive operation.
l
Unpairing
●
When the receive operation is successful,
the time and/or day settings will be
corrected automatically. Summer time will
not be applied correctly in the case
described below.
ー
When the summer time start date and
time, end date and time, or other rules are
changed by authorities
●
If your watch is connected with a phone,
settings must be configured so CASIO
WATCHES can acquire location
information. Even if you are in an area that
is within the reception range of a time signal,
reception will not be performed if settings
are configured in a way that makes signal
reception impossible.
Using Watch Operations to
Correct the Time Setting
If your watch cannot connect with a phone for
some reason, you can use watch operations
to adjust date and time settings.
●
Setting a Home City
Use the procedure in this section to select a
city (time zone) to use as your Home City.
Important!
●
If you do not specify the city (time zone)
where you are using the watch, the
current time setting will not be correct
after it is adjusted based on a time
calibration signal.
1. Pull out the crown to the second click.
The second hand will move to the city
code of the currently selected Home City.
30
Crown
Home City (time zone)
2. Rotate the crown to change the Home
City.
●
You can also select a time zone whose
name is not indicated on the face of the
watch.
●
For details about time zones, refer to the
information below.
l
City Table
3. Push the crown back in.
●
Adjusting the Time and Day Setting
1. Pull out the crown to the second click.
The second hand will move to the city
code of the currently selected Home City.
30
Crown
Home City (time zone)
2. Hold down (C) for at least one second.
This causes the second hand to move to
12 o’clock, and enables the minute setting
operation.
3. Rotate the crown to change the minute
setting.
4. Press (C).
This enables the hour setting operation.
5. Rotate the crown to change the hour
setting.
6. Press (C).
This enables the year ten’s digit setting
operation.
7. Rotate the crown to move the second
hand to the desired setting for the year
ten’s digit.
80 40
90
30
20
50
70
10
60
00
Year (10’s digit)
8. Press (C).
This enables the year one’s digit setting
operation.
Watch Operation Guide 5743
16
9. Rotate the crown to move the second
hand to the desired setting for the year
one’s digit.
84
9
3
2
5
7
1
6
0
Year (one’s digit)
10. Press (C).
This enables the month setting operation.
10
11
12
84
9
3
2
5
7
1
6
Month
11. Rotate the crown to change the month.
12. Press (C).
The mode hand will move slightly,
indicating that the day setting operation is
enabled.
30
Day
●
Changing the day setting will cause the
mode hand to rotate repeatedly.
l
Hand and Day Indicator Movement
13. Rotate the crown to change the day.
●
To return to the minute setting
operation, press (C).
14.
On a time signal at the top of a minute,
push the crown back in.
●
Configuring the Summer Time Setting
(Home City)
If you are in an area that observes summer
time, you can also configure a summer time
setting.
Note
●
The initial factory default summer time
setting for all cities is [AT (AUTO)]. In
many cases, the [AT (AUTO)] setting
lets you use the watch without
switching between summer time and
standard time.
●
When performing a manual operation
to select a time zone for which there is
no city name displayed, use [STD] or
[DST] for the summer time setting.
1. Pull out the crown to the second click.
The second hand will move to the city
code of the currently selected Home City.
30
Crown
Home City (time zone)
2. Hold down (A) for at least one second.
Each time you hold down (A) for at least
one second, the summer time setting will
cycle to the next available option.
30
Summer time setting
●
[AT (AUTO)]
The watch switches between standard
time and summer time automatically.
●
[STD]
The watch always indicates standard
time.
●
[DST]
The watch always indicates summer
time.
3. Push the crown back in.
Checking the Last Time
Correction Result
1. Enter the Calendar Mode.
l
Navigating Between Modes
2. Press (B).
The second hand will indicate the last time
correction operation result. The watch
hands will return to indicating the current
time if you do not perform any operation
for nine or ten seconds.
[Y(YES)]: Last time correction operation
successful.
[N(NO)]: Last time correction operation
failed.
30
Note
●
Even if there was a successful time
calibration signal receive operation or
connection with a phone, the second
hand will point to [N(NO)] if you
subsequently adjusted the time and/or
date setting manually.
Watch Operation Guide 5743
17
Using the Watch in a Medical
Facility or Aircraft
Whenever you are in a hospital, on an aircraft,
or in any other location where auto time
calibration signal receive or connection with a
phone may cause problems, you can perform
the procedure below to disable auto time
correction. To re-enable auto time correction,
perform the same operation again.
1. Enter the Calendar Mode.
l
Navigating Between Modes
2. Press (B).
The second hand will indicate the last
receive result for nine or ten seconds.
30
3. Within 10 seconds after pressing (B)
above, pull out the crown to the first click.
●
If more than 10 seconds elapse before
you pull out the crown after you perform
the operation in step 2, the second hand
will return to indicating seconds. If this
happens, perform step 2 again.
4. Rotate the crown to disable auto time
correction.
[Y(YES)]: Auto time correction enabled
[N(NO)]: Auto time correction disabled
30
Crown
5. Push the crown back in.
Note
●
If the watch is paired with a phone, you
can use the CASIO WATCHES phone
app to disable auto time correction.
l
Using the CASIO WATCHES
Phone App to Disable Auto Time
Correction
World Time
World Time lets you look up the current time
in any one of 27 cities and 38 time zones
around the globe.
Using the CASIO WATCHES
Phone App to Configure
World Time City Settings
If the watch is paired with a phone, you can
also use the CASIO WATCHES phone app to
set the World Time city.
l
Configuring World Time Settings
Note
●
World Time cities that can be selected
only by using the CASIO WATCHES
phone app cannot be selected using
watch operations.
Specifying a World Time City
Use the procedure below to specify the city
(time zone) whose time you want to view.
1. Enter the Calendar Mode.
l
Navigating Between Modes
2. Pull out the crown to the first click.
The second hand will point to the currently
selected World Time City.
30
Crown
World Time City (time zone)
3. Rotate the crown to change the World
Time City (time zone).
The World Time hour and minute hands
indicate the current time in the selected
time zone.
●
You can also select a time zone whose
name is not indicated on the face of the
watch.
●
For details about time zones, refer to the
information below.
l
City Table
30
Crown
World Time hour (24-hour)
World Time hour and minute
4. Push the crown back in.
Watch Operation Guide 5743
18
Configuring the Summer
Time Setting (World Time)
If you are in an area that observes summer
time, you can also configure a summer time
setting.
Note
●
The initial factory default summer time
setting for all cities is [AT (AUTO)]. In
many cases, the [AT (AUTO)] setting
lets you use the watch without
switching between summer time and
standard time.
●
When performing a manual operation
to select a time zone for which there is
no city name displayed, use [STD] or
[DST] for the summer time setting.
●
While [UTC] is selected as the city, you
will not be able to change or check the
summer time setting.
1. Enter the Calendar Mode.
l
Navigating Between Modes
2. Pull out the crown to the first click.
The second hand will point to the currently
selected World Time City (time zone).
3. Hold down (A) for at least one second.
Each time you hold down (A) for at least
one second, the summer time setting will
cycle to the next available option.
●
[AT (AUTO)]
The watch switches between standard
time and summer time automatically.
●
[STD]
The watch always indicates standard
time.
●
[DST]
The watch always indicates summer
time.
30
4. Push the crown back in.
Swapping Your Home City
Time and World Time
In the Calendar Mode, you can swap your
Home City time with your World Time by
holding down (A) for at least three seconds.
Example: To swap your Home City “TYO”
(Tokyo) with your World Time City “NYC”
(New York)
30
30
TYO time
Before swapping After swapping
NYC time
NYC time
TYO time
●
If a swapping operation causes a change in
the day indicator setting, the mode hand will
rotate repeatedly.
l
Hand and Day Indicator Movement
Note
●
This function comes in handy when
you need to move to another time
zone. For details about how to use it,
go to the section below.
l
Moving Between Time Zones
Moving Between Time Zones
Use the procedure below to easily change day
and time settings of the watch to a destination
location.
●
Before Boarding
1. Configure the World Time to the current
time at your destination.
Destination time
Current time
30
l
Using the CASIO WATCHES Phone
App to Configure Settings
l
Using Watch Operations to Configure
Settings
2. Disable auto time correction.
30
l
Using the CASIO WATCHES Phone
App to Configure Settings
l
Using Watch Operations to Configure
Settings
Watch Operation Guide 5743
19
●
After Arriving
1. Swap the origin time zone time with the
destination time zone time.
30
30
Destination time
Destination time
Before swapping After swapping
l
Using CASIO WATCHES to Configure
Settings
l
Using Watch Operations to Configure
Settings
2. Enable auto time correction.
l
Using the CASIO WATCHES Phone
App to Configure Settings
l
Using Watch Operations to Configure
Settings
3. Correct the time setting.
l
Triggering Immediate Time Correction
Alarm
The watch will beep when the alarm time is
reached.
●
The beeper is muted in the cases described
below.
ー
When battery power is low
ー
When the watch is at Level 2 power
saving
l
Power Saving
Using the CASIO WATCHES
Phone App to Configure
Alarm Settings
If the watch is paired with a phone, you can
also use the CASIO WATCHES phone app to
set alarms.
l
Setting the Alarm
Configuring Alarm Settings
1. Enter the Alarm Mode.
l
Navigating Between Modes
2. Pull out the crown to the first click.
This turns on the alarm.
3. Rotate the crown to change the alarm time
setting.
30
Crown
Alarm on
24-hour
Alarm minute
Alarm hour
4. Push the crown back in.
Note
●
A beeper sounds for 10 seconds when
an alarm time is reached.
●
The watch will automatically return
from the Alarm Mode to the Calendar
Mode if you do not perform any
operation for about two or three
minutes.
●
To stop the alarm
To stop the alarm after it starts to sound when
an alarm time is reached, press any button.
Watch Operation Guide 5743
20
Turning Off the Alarm
To stop the alarm from sounding, perform the
steps below to turn it off.
●
To have the alarm sound again, turn it on.
1. Enter the Alarm Mode.
l
Navigating Between Modes
2. Press (B) to move the second hand to
OFF.
●
Each press of (B) toggles between on
and off.
30
Alarm on
Alarm off
Stopwatch
The stopwatch measures elapsed time in units
of one second up to 23 hours, 59 minutes, 59
seconds (24 hours).
Measuring Elapsed Time
30
Seconds
Minutes
Hours (24-hour time)
Hours
1. Enter the Stopwatch Mode.
l
Navigating Between Modes
2. Use the operations below to measure
elapsed time.
A
A
A
A
Stop
Resume
Stop
Start
3. Press (B) to reset the stopwatch to all
zeros.
Note
●
The (C) button operations below can
be performed while a stopwatch
elapsed time measurement operation
is in progress.
ー
Connecting with a Paired Phone to
Correct the Watch’s Time
ー
Pairing or Re-pairing the Watch with
a Phone
Timer
The timer counts down from a start time
specified by you. A beeper sounds when the
end of the countdown is reached.
●
The beeper is muted when battery power is
low.
Using the CASIO WATCHES
Phone App to Configure
Timer Settings
If the watch is paired with a phone, you can
also use the CASIO WATCHES phone app to
set the timer start time.
l
Configuring Timer Settings
Watch Operation Guide 5743
21
Setting the Timer Start Time
1. Enter the Timer Mode.
l
Navigating Between Modes
2. Pull out the crown to the first click.
3. Rotate the crown to change the
countdown start time setting.
●
The countdown start time can be set in
1-minute units up to 24 hours.
30
Crown
Seconds
Hours
24-hour
Minutes
4. Push the crown back in.
Note
●
To specify a countdown start time of 24
hours, align the small hour and minute
hands with 12 o’clock, so the small 24-
hour hand aligns with 24.
Using the Timer
1. Enter the Timer Mode.
l
Navigating Between Modes
2. Press (A) to start the timer countdown.
30
Seconds
Hours
24-hour
Minutes
A beeper sounds for 10 seconds when the
end of the countdown is reached.
●
To pause an ongoing timer countdown,
press (A). You can reset a paused timer
countdown to its start time by pressing
(B).
3. Press any button to stop the tone.
Hand and Day
Indicator Alignment
Strong magnetism or impact can cause the
hands and/or the day indicator to go out of
alignment. If this happens, correct hand and
day indicator alignment.
●
The watch performs alignment of the hour
hand, minute hand, second hand, and 24-
hour hand automatically.
Using the CASIO WATCHES
Phone App to Adjust Hand
and Day Indicator Alignment
If the watch is paired with a phone, you can
also use the CASIO WATCHES phone app to
correct hand and day indicator positions.
l
Correcting Hand and Day Indicator
Alignment
Adjusting Hand and Day
Indicator Alignment
1. Pull out the crown to the second click.
2. Hold down (B) for at least five seconds
until the second hand points to 12 o’clock .
Release the button when the second hand
reaches 12 o’clock.
This will start auto alignment of the hour
hand, minute hand, second hand, and 24-
hour hand.
●
After auto alignment is complete, the
hands should be in the positions shown
below.
30
Crown
Hour hand
Minute hand
Second hand
24-hour hand
3. Press (C).
Confirm that the small hour and minute
hands, and the small 24-hour hand are all
stopped at 12 o’clock.
30
Small minute hand
Small hour hand
Small 24-hour hand
4. If the small hour and minute hands, and
the small 24-hour hand are not at 12
o’clock, rotate the crown to align them with
12 o’clock.
5. Press (C).
Confirm that the mode hand is stopped at
12 o’clock, and check if the day is
indicated properly.
30
30
Mode hand
Day (Operation start day)
6. If the mode hand and/or the day indicator
is out of alignment, rotate the crown to
move the mode hand to 12 o’clock and the
day to the center of the indicator window.
●
The movement range of the mode hand
and day indicator is limited when you
rotate the crown. The maximum left-
right movement of the mode hand is 180
degrees in either direction. The day
indicator moves only slightly.
●
After the mode hand and day indicator
are in the positions you want, advance
to step 9 of this procedure. If you are
unable to make the adjustments you
want, go to step 7.
Watch Operation Guide 5743
22
7. Press (C).
Confirm that the day indicator shows “1”.
30
1
Date
●
Changing the date setting will cause the
mode hand to rotate repeatedly. In
some cases, the mode hand may
continue to rotate for about 5 minutes.
l
Hand and Day Indicator Movement
8. If “1” is not shown for the day, rotate the
crown until “1” is shown for the day.
●
The mode hand moves in conjunction
with crown rotation. Move the mode
hand to 12 o’clock.
9. Push the crown back in.
Note
●
Leaving the crown pulled out for more
than approximately 30 minutes without
performing any operation will
automatically cause the adjustment
operation to become disabled. If this
happens, push the crown back in to its
normal position and then pull it out
again to restart the procedure from the
beginning. Pushing the crown in to its
normal position part way through the
alignment procedure will cause the
hands to return to their normal position.
Any alignment you performed up to
that point will be applied.
Other Settings
This section explains other watch settings you
can configure.
Resetting Watch Settings
This section explains how to return the watch
settings below to their initial factory defaults.
●
Watch Settings
●
Stopwatch
●
Timer
●
Alarm
1. Pull out the crown to the second click.
2. Hold down (C) for at least five seconds
until the second hand points to 12 o’clock
twice.
Resetting watch settings causes the
second hand to move to 12 o’clock.
Second hand
3. Push the crown back in.
Specifications
Accuracy at normal temperature :
±15 seconds per month when time
correction by time calibration signal
reception or by communication with a
phone is not possible.
Timekeeping :
Hour, minute (10-second hand movement),
second, day (Full Auto Calendar 2000 to
2099), day of the week
Signal Receive Functions :
Auto receive, manual receive
Auto transmitter selection (for JJY, MSF/
DCF77)
Receivable Call Signs
JJY (40kHz/60kHz), BPC (68.5kHz),
WWVB (60kHz), MSF (60kHz), DCF77
(77.5kHz)
Automatic and manual switching between
standard time and summer time.
Auto time correction enable/disable
switching
World Time :
Current time in 38 time zones (including 27
world cities)* and Coordinated Universal
Time (UTC) time display, summer time auto
switching
* Subject to updates by connection between
the watch and a phone.
Stopwatch :
Measuring unit: 1 second
Measuring capacity: 23:59’59” (24 hours)
Measuring functions: Elapsed time
Alarm :
Daily alarm
Setting units: Hours, minutes
Beeper: 10 seconds
Timer :
Setting unit: 1 minute
Countdown range: 24 hours
Measuring unit: 1 second
10-second beeper when the end of the
countdown is reached
Watch Operation Guide 5743
23
Mobile Link :
Auto Time Correction
Time setting corrected automatically at
preset time
One-touch Time Correction
Manual connection and time correction
Phone finder
Watch operation sounds the alert sound
of the phone.
Home Time swapping
Auto Summer Time Switching
Automatic switching between standard
time and summer time
Timer Settings
Alarm Settings
Hand alignment correction
TIME&PLACE
Auto time correction enable/disable
switching
Data Communication Specifications
Bluetooth
®
Frequency Band: 2400MHz to 2480MHz
Maximum Transmission: 0 dBm (1 mW)
Communication range: Up to 2 meters
(depends on environment)
Other :
High-luminosity LED light (Super
Illumination, afterglow)
Auto hand alignment correction
Power Saving
Battery Indicator
Low Battery Alert
Power Supply :
Solar panel and one rechargeable battery
(Type: CTL920)
Battery nominal voltage: 2.3V
Approximate Battery Life :
Approximately 5 months
Conditions
Auto time correction using a smartphone:
4 times/day
Alarm: Once (10 seconds)/day
Illumination: Once (1.5 seconds)/day
Power Saving: 6 hours/day
Specifications are subject to change without
notice.
Other Information
This section provides non-operational
information you also need to know. Refer to
this information as required.
City Table
You can specify a time zone whose city code
is not shown on the face by aligning the
second hand with the applicable UTC offset.
City
code
City name
Second
Hand
Position
Offset
UTC
Coordinated
Universal Time
0 0
LON* London 2 0
PAR* Paris 4 +1
ATH* Athens 6 +2
JED Jeddah 8 +3
- - 9 +3.5
DXB Dubai 10 +4
- - 11 +4.5
- - 12 +5
DEL Delhi 13 +5.5
- - 14 +5.75
DAC Dhaka 15 +6
- - 16 +6.5
BKK Bangkok 17 +7
BJS* Beijing 19 +8
- - 21 +8.75
TYO* Tokyo 22 +9
- - 23 +9.5
SYD Sydney 24 +10
- - 25 +10.5
NOU Noumea 26 +11
WLG Wellington 28 +12
- - 29 +12.75
TBU Nuku’alofa 30 +13
CXI Kiritimati 32 +14
BAR Baker Island 36 -12
PPG Pago Pago 38 -11
HNL Honolulu 40 -10
- - 41 -9.5
ANC Anchorage 42 -9
LAX* Los Angeles 44 -8
DEN* Denver 46 -7
CHI* Chicago 48 -6
NYC* New York 50 -5
YHZ* Halifax 52 -4
- - 53 -3.5
RIO Rio de Janeiro 54 -3
FEN
Fernando de
Noronha
56 -2
RAI Praia 58 -1
* Time zones where time calibration signal
reception is possible.
●
The information in the above table is current
as of July 2024.
Summer Time Table
When [AT (AUTO)] is selected for a city that
observes summer time, switching between
standard time and summer time will be
performed automatically at the timing shown
in the table below.
Note
●
Summer time start and end dates for
your current location may be different
from those shown below. If this
happens, you can have new summer
time information for your Home City
and World Time City sent to the watch
by connecting the watch with a phone.
If the watch is not connected with a
phone, you can change the summer
time setting manually.
City name
Summer Time
Start
Summer Time
End
London
01:00, last
Sunday in
March
02:00, last
Sunday in
October
Paris
02:00, last
Sunday in
March
03:00, last
Sunday in
October
Athens
03:00, last
Sunday in
March
04:00, last
Sunday in
October
Sydney
02:00, first
Sunday in
October
03:00, first
Sunday in April
Wellington
02:00, last
Sunday in
September
03:00, first
Sunday in April
Anchorage
02:00, second
Sunday in
March
02:00, first
Sunday in
November
Los
Angeles
02:00, second
Sunday in
March
02:00, first
Sunday in
November
Denver
02:00, second
Sunday in
March
02:00, first
Sunday in
November
Chicago
02:00, second
Sunday in
March
02:00, first
Sunday in
November
New York
02:00, second
Sunday in
March
02:00, first
Sunday in
November
Halifax
02:00, second
Sunday in
March
02:00, first
Sunday in
November
●
The information in the above table is current
as of July 2024.
Watch Operation Guide 5743
24
Supported Phones
For information about phones that can
connect with the watch, visit the CASIO
website.
https://world.casio.com/os_mobile/wat/
Copyrights and Registered
Copyrights
●
The Bluetooth
®
word mark and logos are
registered trademarks owned by the
Bluetooth SIG, Inc. and any use of such
marks by CASIO Computer Co., Ltd. is
under license.
●
iPhone and App Store are trademarks of
Apple Inc. in the United States and other
countries.
●
IOS is a trademark or registered trademark
of Cisco Systems, Inc.
●
Android and Google Play
TM
are trademarks
or registered trademarks of Google LLC.
●
Other company names and product names
used herein are trademarks or registered
trademarks of their respective companies.
Watch Operation Guide 5743
25
Troubleshooting
Signal Reception (Time
Calibration Signal)
Q1
The watch cannot perform a receive
operation.
Is the watch’s battery charged?
Signal reception is not possible while
battery power is low. Keep the watch
exposed to light until it recharges
sufficiently.
l
Charging
Is the watch in the Calendar Mode?
Time signal reception is performed only
while the watch is in the Calendar Mode.
Return to the Calendar Mode.
l
Navigating Between Modes
Is auto time correction enabled?
Time signals cannot be received while
auto time correction is disabled. Enable
auto time correction.
l
Using the CASIO WATCHES Phone
App to Configure Settings
l
Using Watch Operations to Configure
Settings
Is your Home City setting correct for your
location?
The watch will not indicate the correct time
if the Home City setting is wrong. Change
your Home City setting so it correctly
reflects your location.
l
Setting a Home City
After checking the above, the watch still
cannot perform a receive operation.
Time calibration signal reception is not
possible under the conditions described
below.
●
When watch is at Level 2 power saving
●
When the crown is pulled out
●
While the watch is paired with a phone
For information about unpairing, see
“Unpairing”.
If successful reception is not possible for
some reason, you can adjust the time and
day settings manually.
Q2
The signal receive operation always
fails.
Is the watch in a location that is appropriate
for signal reception?
Check your surroundings and move the
watch to a location where signal reception
is better.
l
Appropriate Signal Reception Location
Did you avoid touching the watch while the
receive operation was in progress?
Minimize movement of the watch and do
not perform any watch operation while a
receive operation is in progress.
Is the signal transmitter in your area
transmitting a signal?
The transmitter of the time calibration may
not be transmitting a signal.
Try again later.
Q3
Signal reception should have been
successful, but the watch’s time and/
or day is wrong.
Is the time zone where you are using the
watch specified correctly?
Specify the time zone where you are using
the watch.
l
Setting a Home City
l
Specifying a World Time City
Is the hand and/or day indicator alignment
correct?
Adjust hand and/or day indicator
alignment.
l
Hand and Day Indicator Alignment
After checking the above, the time and/or
day settings is still wrong.
Adjust time and day settings manually.
l
Using Watch Operations to Correct the
Time Setting
I can’t pair the watch with a
phone.
Q1
I’ve never been able to establish a
(pairing) connection between the
watch and phone.
Are you using a supported phone model?
Check if the phone model and its
operating system are supported by the
watch.
For information about supported phone
models, visit the CASIO Website.
https://world.casio.com/os_mobile/wat/
Did you install the CASIO WATCHES
phone app on your phone?
The CASIO WATCHES phone app needs
to be installed on your phone in order to
connect with the watch.
l
A
Install the required app on your
phone.
Are your phone’s Bluetooth settings
configured correctly?
Configure the phone’s Bluetooth settings.
For details about setting procedures, see
your phone documentation.
iPhone Users
●
“Settings”
n
“Bluetooth”
n
On
●
“Settings”
n
“Privacy”
n
“Bluetooth”
n
“CASIO WATCHES”
n
On
Android Users
●
Enable Bluetooth.
Other than the above.
Some phones need to have BT Smart
disabled to use the CASIO WATCHES
phone app. For details about setting
procedures, see your phone
documentation.
On the Home Screen, tap: “Menu”
n
“Settings”
n
“Bluetooth”
n
“Menu”
n
“BT Smart settings”
n
“Disable”.
Watch Operation Guide 5743
26
I can’t reconnect the watch
and phone.
Q1
The watch will not re-connect with the
phone after they are disconnected.
Is the CASIO WATCHES phone app
running?
The watch cannot re-connect with your
phone unless the CASIO WATCHES app
is running on the phone. On your phone’s
Home Screen, tap the “CASIO
WATCHES” icon. Next, on the watch, hold
down (C) for at least 2.5 seconds.
30
Have you tried turning your phone off and
then back on again?
Turn your phone off and back on, and then
tap the “CASIO WATCHES” icon. Next,
on the watch, hold down (C) for at least 2.5
seconds.
30
Is the watch’s battery charged sufficiently?
Connection with a phone is not possible
while the charge is low. Charge the watch
and then connect with the phone.
30
Q2
I can’t connect while my phone is in
the Airplane Mode.
Connection with the watch is not possible
while your phone is in the Airplane Mode. After
disabling the phone’s Airplane Mode, go to the
phone’s Home Screen and tap the “CASIO
WATCHES” icon. Next, on the watch, hold
down (C) for at least 2.5 seconds.
30
Q3
I can’t establish a connection after
disabling the auto time correction on
the watch.
On the watch, enable auto time correction and
then hold down (C) for at least 2.5 seconds.
l
Using the CASIO WATCHES Phone App to
Configure Settings
l
Using Watch Operations to Configure
Settings
30
Q4
I changed the phone’s Bluetooth
from enabled to disabled, and now I
can’t connect anymore.
On your phone, re-enable Bluetooth, and then
go to the Home Screen and tap the “CASIO
WATCHES” icon. Next, on the watch, hold
down (C) for at least 2.5 seconds.
30
Q5
I can’t connect after turning off the
phone.
Turn your phone off and back on, and then tap
the “CASIO WATCHES” icon. Next, on the
watch, hold down (C) for at least 2.5 seconds.
30
Phone-Watch Connection
Q1
I can’t establish a connection
between the phone and watch.
Have you tried turning your phone off and
then back on again?
Turn your phone off and back on, and then
tap the “CASIO WATCHES” icon. Next,
on the watch, hold down (C) for at least 2.5
seconds.
30
Has the watch been re-paired with the
phone?
After deleting the pairing information from
the CASIO WATCHES phone app and
your phone, re-pair the watch and phone.
l
Deleting Pairing Information from the
CASIO WATCHES phone app
l
C
Pair the watch with a phone.
If you are unable to establish a
connection...
After deleting pairing information from the
watch, re-pair it with your phone.
l
Deleting Pairing Information from the
Watch
l
C
Pair the watch with a phone.
Watch Operation Guide 5743
27
Changing to a Different
Phone Model
Q1
How do I connect my watch to a
different phone?
Delete the pairing information from your watch
and then pair it with the phone you want to
connect with.
l
If you purchase another phone
Auto Time Correction by
Bluetooth Connection (Time
Correction)
Q1
When does the watch correct its
time?
Your watch can connect with a paired phone
to adjust its time setting. The watch will
connect with the phone and perform auto time
correction at around 12:30 a.m., 6:30 a.m.,
12:30 p.m. and 6:30 p.m. Also, time signal
auto-receive will be performed if there has
been no auto time correction based on
connection between the watch and phone for
more than one day.
Q2
Auto time correction is performed,
but the time setting is not correct.
Is auto time correction not being
performed according to its normal
schedule?
Note that auto time correction is not
performed for 24 hours after swapping of
the Home Time and World Time, or after
the time setting is corrected manually on
the watch. Auto time correction will
resume 24 hours after either of the above
operations is performed.
Is auto time correction enabled?
Auto time correction will not be performed
at the scheduled times if it is not enabled.
Establish a connection between the watch
and phone, and then use the CASIO
WATCHES phone app to enable auto
time correction.
l
Using the Watch in a Medical Facility or
Aircraft
Is the watch’s battery charged sufficiently?
Connection with a phone is not possible
while the charge is low. Charge the watch.
30
Q3
Time is not displayed correctly.
If your phone is unable to receive a signal
because you are outside its service range or
for some other reason, the watch may not be
able to display the correct time. If this
happens, connect the phone to its network
and then correct the time setting.
Q4
Time signal reception is not
performed while watch is connected
with a phone.
The watch does not receive a time signal for
time correction while it is connected with a
phone. However, time signal auto-receive is
performed if there has been no auto time
correction based on connection between the
watch and phone for more than one day.
World Time
Q1
The time for a World Time City is not
correct.
The summer time start date and time, end date
and time, or other rules were changed by
authorities.
Alarm
Q1
The alarm does not sound.
Is the watch’s battery charged?
Keep the watch exposed to light until it
recharges sufficiently.
l
Charging
The crown is pulled out.
The alarm will not sound while the crown
is pulled out. Push the crown back in to its
normal position.
Is the alarm enabled?
Enable the alarm.
l
Configuring Alarm Settings
Hand Movement and
Indications
Q1
I don’t know what mode the watch is
in.
You can determine the current mode by
checking the mode hand position. You can
use (C) to navigate between modes.
l
Navigating Between Modes
30
Q2
Why can’t I perform any button
operations while high-speed hand
movement is in progress?
Except for the mode navigation button, button
operation is disabled while high-speed hand
movement is in progress after a watch setting
is changed, etc. Wait until the hands stop
moving before performing button operations.
Q3
The second hand is jumping at two-
second intervals.
Battery power is low. Keep the watch exposed
to light until it recharges sufficiently.
l
Charging
Q4
All hands are stopped at 12 o’clock
and buttons do not work.
The battery is dead. Keep the watch exposed
to light until it recharges sufficiently.
l
Charging
Q5
The hands suddenly start moving at
high speed.
This is due to the reason (or one of the
reasons) below, and does not indicate
malfunction. Simply wait until normal hand
movement resumes.
●
The watch is recovering from a power
saving state.
l
Power Saving
●
A time calibration signal is being received
and the time setting is being adjusted.
l
Time Adjustment Using a Time Signal
●
Watch is connected with a phone to correct
its time setting.
l
Auto Time Correction
Watch Operation Guide 5743
28
Q6
Hands are stopped and buttons do
not work.
The watch is in the charge recovery mode.
Wait until the recovery process is complete
(for about 15 minutes). The watch will recover
more quickly if you place it in a brightly lit
location.
Q7
Why is the current time indicated by
the watch is off by a certain amount
of time (nine hours, three hours and
15 minutes, etc.)?
The city setting is not correct. Select the
correct setting.
l
Setting a Home City
Q8
The current time indicated by the
watch is off by one hour or 30
minutes.
The summer time setting is not correct. Select
the correct setting.
l
Configuring the Summer Time Setting
(Home City)
Q9
The hand and/or day indicator are not
aligned correctly.
Strong magnetism or impact can cause the
hands and/or the indicator to go out of
alignment. Correct hand and/or day indicator
alignment.
l
Correcting Hand and Day Indicator
Alignment
●
Check the information below to find out how
to align the hands and/or day indicator
manually.
l
Hand and Day Indicator Alignment
Q10
The time setting is correct, but the
day indicator is between days.
Is the date setting being updated?
For information about how the day
changes, see the section below.
l
Hand and Day Indicator Movement
Other than the above.
The day indicator is not aligned correctly.
Correct day indicator alignment.
l
Correcting Hand and Day Indicator
Alignment
●
Check the information below to find out
how to align the hands and/or day
indicator manually.
l
Hand and Day Indicator Alignment
Crown Operations
Q1
Nothing happens when I rotate the
crown.
If you do not perform any operation for about
two minutes after pulling out the crown
(approximately 30 minutes in the case of hand
and day indicator alignment), crown
operations will automatically become
disabled. Push the crown back in to its normal
position and then pull it out again to re-enable
crown operations.
l
Using the Crown
Q2
Crown operation does not work.
Crown operation is disabled while high-speed
hand movement is in progress after a watch
setting is changed, etc. Wait until the hands
stop moving before performing crown
operations.
Charging
Q1
The watch does not work even
though it is exposed to light.
The watch stops operating whenever the
battery goes dead. Keep the watch exposed
to light until it recharges sufficiently.
l
Charging
Other
Q1
I can’t find the information I need
here.
Visit the website below.
https://world.casio.com/support/
Watch Operation Guide 5743
29
Precautions
Operating Precautions
●
Water Resistance
●
The information below applies to watches
with WATER RESIST or WATER
RESISTANT marked on the back cover.
Water Resistance Under Daily Use
Marking on watch front or on
back cover
No BAR
mark
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming No
Windsurfing No
Skin diving No
Enhanced Water Resistance Under Daily
Use
5 Atmospheres
Marking on watch front or on
back cover
5BAR
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming Yes
Windsurfing No
Skin diving No
10 Atmospheres
Marking on watch front or on
back cover
10BAR
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming Yes
Windsurfing Yes
Skin diving Yes
20 Atmospheres
Marking on watch front or on
back cover
20BAR
Example of Daily Use
Hand washing, rain Yes
Water-related work, swimming Yes
Windsurfing Yes
Skin diving Yes
●
Do not use your watch for scuba diving or
other types of diving that requires air tanks.
●
Watches that do not have WATER RESIST
or WATER RESISTANT marked on the
back cover are not protected against the
effects of sweat. Avoid using such a watch
under conditions where it will be exposed to
large amounts of sweat or moisture, or to
direct splashing with water.
●
Even if a watch is water resistant, note the
usage precautions described below. Such
types of use reduce water resistance
performance and can cause fogging of the
glass.
ー
Do not operate the crown or buttons while
your watch is submersed in water or wet.
ー
Avoid wearing your watch while in the
bath.
ー
Do not wear your watch while in a heated
swimming pool, sauna, or any other high
temperature/high humidity environment.
ー
Do not wear your watch while washing
your hands or face, while doing
housework, or while performing any other
task that involves soaps or detergents.
●
After submersion in seawater, use plain
water to rinse all salt and dirt from your
watch.
●
To maintain water resistance, have the
gaskets of your watch replaced periodically
(about once every two or three years).
●
A trained technician will inspect your watch
for proper water resistance whenever you
have its battery replaced. Battery
replacement requires the use of special
tools. Always request battery replacement
from your original retailer or from an
authorized CASIO service center.
●
Some water-resistant watches come with
fashionable leather bands. Avoid
swimming, washing, or any other activity
that causes direct exposure of a leather
band to water.
●
The inside surface of the watch glass may
fog when the watch is exposed to a sudden
drop in temperature. No problem is
indicated if the fogging clears up relatively
quickly. Sudden and extreme temperature
changes (such as coming into an air
conditioned room in the summer and
standing close to an air conditioner outlet,
or leaving a heated room in the winter and
allowing your watch to come into contact
with snow) can cause it to take longer for
glass fogging to clear up. If glass fogging
does not clear up or if you notice moisture
inside of the glass, immediately stop using
your watch and take it to your original
retailer or to an authorized CASIO service
center.
●
Your water-resistant watch has been tested
in accordance with International
Organization for Standardization
regulations.
●
Band
●
Tightening the band too tightly can cause
you to sweat and make it difficult for air to
pass under the band, which can lead to skin
irritation. Do not fasten the band too tightly.
There should be enough room between the
band and your wrist so you can insert your
finger.
●
Deterioration, rust, and other conditions can
cause the band to break or come off of your
watch, which in turn can cause band pins to
fly out of position or to fall out. This creates
the risk of your watch falling from your wrist
and becoming lost, and also creates the risk
of personal injury. Always take good care of
your band and keep it clean.
●
Immediately stop using a band if you even
notice any of the following: loss of band
flexibility, band cracks, band discoloration,
band looseness, band connecting pin flying
or falling out, or any other abnormality. Take
your watch to your original retailer or to a
CASIO service center for inspection and
repair (for which you will be charged) or to
have the band replaced (for which you will
be charged).
●
Temperature
●
Never leave your watch on the dashboard
of a car, near a heater, or in any other
location that is subject to very high
temperatures. Do not leave your watch
where it will be exposed to very low
temperatures. Temperature extremes can
cause your watch to lose or gain time, to
stop, or otherwise malfunction.
Watch Operation Guide 5743
30
●
Impact
●
Your watch is designed to withstand impact
incurred during normal daily use and during
light activity such as playing catch, tennis,
etc. Dropping your watch or otherwise
subjecting it to strong impact, however, can
lead to malfunction. Note that watches with
shock-resistant designs (G‑SHOCK,
BABY‑G, G‑MS) can be worn while
operating a chain saw or engaging in other
activities that generate strong vibration, or
while engaging in strenuous sports
activities (motocross, etc.)
●
Magnetism
●
The hands of analog and combination
(analog-digital) watches are moved by a
motor that uses magnetic force. When such
a watch is close to a device (audio
speakers, magnetic necklace, cell phone,
etc.) that emits strong magnetism, the
magnetism can cause timekeeping to slow
down, speed up, or stop, resulting in the
incorrect time being displayed.
●
Very strong magnetism (from medical
equipment, etc.) should be avoided
because it can cause malfunction of your
watch and damage to electronic
components.
●
Electrostatic Charge
●
Exposure to very strong electrostatic
charge can cause your watch to display the
wrong time. Very strong electrostatic
charge even can damage electronic
components.
●
Chemicals
●
Do not allow your watch to come into
contact with thinner, gasoline, solvents,
oils, or fats, or with any cleaners, adhesives,
paints, medicines, or cosmetics that contain
such ingredients. Doing so can cause
discoloration of or damage to the resin
case, resin band, leather, and other parts.
●
Storage
●
If you do not plan to use your watch for a
long time, thoroughly wipe it free of all dirt,
sweat, and moisture, and store it in a cool,
dry place.
●
Resin Components
●
Allowing your watch to remain in contact
with other items or storing it together with
other items for long periods while it is wet
can cause color on resin components to
transfer to the other items, or the color of the
other items to transfer to the resin
components of your watch. Be sure to dry
off your watch thoroughly before storing it
and make sure it is not in contact with other
items.
●
Leaving your watch where it is exposed to
direct sunlight (ultraviolet rays) for long
periods or failure to clean dirt from your
watch for long periods can cause it to
become discolored.
●
Friction caused by certain conditions
(strong external force, sustained rubbing,
impact, etc.) can cause discoloration of
painted components.
●
If there are printed figures on the band,
strong rubbing of the printed area can cause
discoloration.
●
Leaving your watch wet for long periods can
cause fluorescent color to fade. Wipe the
watch dry as soon as possible after it
becomes wet.
●
Semi-transparent resin parts can become
discolored due to sweat and dirt, and if
exposed to high temperatures and humidity
for long periods.
●
Daily use and long-term storage of your
watch can lead to deterioration, breaking, or
bending of resin components. The extent of
such damage depends on usage conditions
and storage conditions.
●
Leather Band
●
Allowing your watch to remain in contact
with other items or storing it together with
other items for long periods while it is wet
can cause the color of the leather band to
transfer to the other items or the color of the
other items to transfer to the leather band.
Be sure to dry off your watch thoroughly with
a soft cloth before storing it and make sure
it is not in contact with other items.
●
Leaving a leather band where it is exposed
to direct sunlight (ultraviolet rays) for long
periods or failure to clean dirt from a leather
band for long periods can cause it to
become discolored.
CAUTION:
Exposing a leather band to rubbing or dirt
can cause color transfer and discoloration.
●
Metal Components
●
Failure to clean dirt from metal components
can lead to formation of rust, even if
components are stainless steel or plated. If
metal components exposed to sweat or
water, wipe thoroughly with a soft,
absorbent cloth and then place the watch in
a well-ventilated location to dry.
●
Use a soft toothbrush or similar tool to scrub
the metal with a weak solution of water and
a mild neutral detergent, or with soapy
water. Next, rinse with water to remove all
remaining detergent and then wipe dry with
a soft absorbent cloth. When washing metal
components, wrap the watch case with
kitchen plastic wrap so it does not come into
contact with the detergent or soap.
●
Bacteria and Odor Resistant Band
●
The bacteria and odor resistant band
protects against odor generated by the
formation of bacteria from sweat, which
ensures comfort and hygiene. In order to
ensure maximum bacteria and odor
resistance, keep the band clean. Use an
absorbent soft cloth to thoroughly wipe the
band clean of dirt, sweat, and moisture. A
bacteria and odor resistant band
suppresses the formation of organisms and
bacteria. It does not protect against rash
due to allergic reaction, etc.
Note that CASIO Computer Co., Ltd.
assumes no responsibility for any
damage or loss suffered by you or any
third party arising through the use of your
watch or its malfunction.
Watch Operation Guide 5743
31
User Maintenance
●
Caring for Your Watch
Remember that you wear your watch next to
your skin, just like a piece of clothing. To
ensure your watch performs at the level for
which it is designed, keep it clean by
frequently wiping with a soft cloth to keep your
watch and band free of dirt, sweat, water and
other foreign matter.
●
Whenever your watch is exposed to sea
water or mud, rinse it off with clean fresh
water.
●
For a metal band or a resin band with metal
parts, use a soft toothbrush or similar tool to
scrub the band with a weak solution of water
and a mild neutral detergent, or with soapy
water. Next, rinse with water to remove all
remaining detergent and then wipe dry with
a soft absorbent cloth. When washing the
band, wrap the watch case with kitchen
plastic wrap so it does not come into contact
with the detergent or soap.
●
For a resin band, wash with water and then
wipe dry with a soft cloth. Note that
sometimes a smudge like pattern may
appear on the surface of a resin band. This
will not have any effect on your skin or
clothing. Wipe with a cloth to remove the
smudge pattern.
●
Clean water and sweat from a leather band
by wiping with a soft cloth.
●
Not operating a watch crown, buttons, or
rotary bezel could lead to later problems
with their operation. Periodically rotate the
crown and rotary bezel, and press buttons
to maintain proper operation.
●
Dangers of Poor Watch Care
Rust
●
Though the metal steel used for your watch
is highly rust-resistant, rust can form if your
watch is not cleaned after it becomes dirty.
ー
Dirt on your watch can make it impossible
for oxygen to come into contact with the
metal, which can lead to breakdown of
the oxidization layer on the metal surface
and the formation of rust.
●
Rust can cause sharp areas on metal
components and can cause band pins to fly
out of position or to fall out. If you ever notice
any abnormality immediately stop using
your watch and take it to your original
retailer or to an authorized CASIO service
center.
●
Even if the surface of the metal appears
clean, sweat and rust in crevasses can soil
the sleeves of clothing, cause skin irritation,
and even interfere with watch performance.
Premature Wear
●
Leaving sweat or water on a resin band or
bezel, or storing your watch an area subject
to high moisture can lead to premature
wear, cuts, and breaks.
Skin Irritation
●
Individuals with sensitive skin or in poor
physical condition may experience skin
irritation when wearing a watch. Such
individuals should keep their leather band
or resin band particularly clean. Should you
ever experience a rash or other skin
irritation, immediately remove your watch
and contact a skin care professional.
Battery
●
The special rechargeable battery used by
your watch is not intended to be removed or
replaced by you. Use of a rechargeable
battery other than the special one specified
for your watch can damage your watch.
●
The rechargeable (secondary) battery is
charged when the solar panel is exposed to
light, so it does not require regular
replacement as the primary battery
requires. Note, however, that long use or
operating conditions can cause the
capacity or charging efficiency of the
rechargeable battery to deteriorate. If you
feel that the amount of operation provided
by charging is too short, contact your
original retailer or CASIO service center.
Watch Operation Guide 5743
32
Mobile Link Precautions
●
Legal Precautions
●
This watch complies with or has received
approval under the radio laws of various
countries and geographical areas. Using
this watch in an area where it does not
comply with or has not received approval
under applicable radio laws may be a
criminal offense. For details, visit the CASIO
Website.
https://world.casio.com/ce/BLE/
●
Use of this watch inside of aircraft is
restricted under the aviation laws of each
country. Be sure to follow the instructions of
airline personnel.
●
Precautions when using Mobile Link
●
When using this watch in combination with
a phone, keep the watch and phone close
to each other. A range of two meters is
recommended as a guideline, but the local
environment (walls, furniture, etc.), the
structure of a building, and other factors
may require a much closer range.
●
This watch can be affected by other devices
(electrical devices, audio-visual equipment,
office equipment, etc.) In particular, it can
be affected by operation of a microwave
oven. The watch may not be able to
communicate normally with a phone if a
microwave oven is operating nearby.
Conversely, this watch may cause noise in
radio reception and the video image of a TV.
●
Bluetooth of this watch uses the same
frequency band (2.4 GHz) as wireless LAN
devices, and use of such devices in close
proximity of this watch may result in radio
interference, slower communication
speeds and noise for the watch and the
wireless LAN device, or even
communication failure.
●
Stopping Radio Wave Emission by This
Watch
The watch is emitting radio waves whenever
the second hand is pointing to [C].
Even if the second hand is not pointing at [C],
the watch will automatically attempt to
connect with a phone four times a day to adjust
its time settings.
When in a hospital, on an aircraft, or in any
other area where the use of radio waves is not
allowed, use the operation below to stop radio
wave generation.
●
Stopping Radio Wave Generation
Press any button to terminate the Bluetooth
connection.
30
30
DisconnectedConnected
●
Disabling Auto Time Correction
Configure CASIO WATCHES phone app
settings to disable synchronization
between the watch and phone.
l
Using the Watch in a Medical Facility or
Aircraft
Watch Operation Guide 5743
33
