10000
10
FRI
IW1
Smart Watch
User Manual
Thank you for purchasing our products. This manual addresses the
safety guidelines, warranty, and operating instructions. Please
review this manual thoroughly before operating your device.
All pictures in this manual are for illustration purpose only. Actual product
may vary due to product firmware upgrade and app upgrade.
Table of Contents
English Version .................................................... 1
Getting Started
................................................................1
What’s in the Box...............................................................1
What’s in this Document....................................................1
Setting up Your Watch..................................................1
Charging Your Watch.........................................................1
Disassembling / Assembling Your Watch...........................2
Wearing Your Watch......................................................4
Using Your Watch...........................................................5
App Installation ..................................................................5
Account Registration and Login ........................................6
Pairing the Watch with Your Phone....................................7
App Interfaces....................................................................9
Getting to Know Your Watch.....................................11
Basic Operation ................................................................11
Watch Interfaces...............................................................11
Function Introduction..................................................13
1. Tracking Sports.............................................................14
2. Tracking Daily Activity Data...........................................15
3. Monitoring Heart Rate...................................................15
4. Measuring Blood Oxygen Level....................................16
5. Breathing Guide............................................................17
6. Setting Alarms...............................................................17
7. Controlling Phone Music...............................................17
8. More Functions .............................................................18
8.1 Call Notification.......................................................18
8.2 Message Notification...............................................18
8.3 Sedentary Reminder ..............................................18
8.4 Stopwatch...............................................................18
8.5 Timer.......................................................................19
Basic Specifications.....................................................
19
FAQs ..................................................................................
20
Warranty ...........................................................................
22
Important Safety Instructions
...................................22
- 1 -
What’s in the Box
Getting Started
Setting up Your Watch
What’s in this Document
This manual gets you started quickly with setting up your watch.
Setup ensures that your watch can synchronize its data with the
Letsfit app, where you can get detailed information on your
stats, view historical trends, log sleep, and more. As soon as
setup is complete, you’re ready to start moving. The remainder
of the manual walks you through every function on your IW1.
Charging Your Watch
Please fully charge your watch before initial use.
1. Insert the USB plug of the charging cable into the USB port
on your computer or a UL-certified USB wall charger.
2. Hold the other end of the charging cable near the port on
the back of the watch until it attaches magnetically.
3. Make sure the pins on the charging cable lock securely with
the port. The connection is secure when the watch vibrates
and the battery icon with percent charged appears on the
screen.
Charging cable User manualSmart watch
(IW1 with bands)
Quick start
guide
Quick Start
Guide
IW1
Smart Watch
User Manual
Thank you for purchasing our products. This manual addresses the
safety guidelines, warranty, and operating instructions. Please
review this manual thoroughly before operating your device.
All pictures in this manual are for illustration purpose only. Actual product
may vary due to product firmware upgrade and app upgrade.
1
- 2 -
When the watch shows that the battery is
low, connect the watch to a USB port with
5V-500mA.
While the watch charges, there is a battery
progress circle on the screen and you can
check the battery level at any time.
4. Remove the watch from the power supply once fully charged.
● USB charger requirement: DC USB port (5V-500mA)
● Charging time: Approximately 2 hours
Disassembling / Assembling Your Watch
Disassembly
1. To remove the wristbands, turn over the watch and find the
quick-release lever.
2. While pressing the quick-release lever inward, gently pull the
wristband away from the watch to release it.
- 3 -
3. Repeat on the other side.
Assembly
1. To reattach the wristbands, slide the pin (the side opposite
the quick-release lever) into the notch on the watch. Attach
the wristband with the clasp to the top of the watch.
2. While pressing the quick-release lever inward, slide the
other end of the wristband into place.
3. When both ends of the pin are inserted, release the
quick-release lever.
All-day Wear and Exercise
Wearing Your Watch
- 4 -
For all-day wear when you’re not exercising, wear the device
on your wrist horizontally, a finger’s width below your wrist
bone and lying flat, the same way you would put on a watch.
For optimized heart rate tracking, keep these tips in mind:
1. Experiment with wearing the watch higher on your wrist during
exercise. Because the blood flow in your arm increases the
farther up you go, moving the watch up a couple of inches can
improve the heart rate signal. Also, many exercises such as
bike riding or weight lifting require you to bend your wrist
frequently, which is more likely to interfere with the heart rate
signal if the watch is lower on your wrist.
2. Do not wear your watch too tight. A tight band restricts blood
flow, potentially affecting the heart rate signal. This being
said, the watch should also be slightly tighter (snug but not
constricting) during exercise than during all-day wear.
- 5 -
Using Your Watch
App Installation
Use the watch with our customized Letsfit app. You can
download Letsfit from App Store / Google Play or scan the QR
codes below to download.
AndroidiOS
Letsfit
Note:
The Letsfit app is only compatible with smartphones, not
tablets or PCs.
● iOS 11.0 & higher
● Android 6.0 & higher
● Bluetooth 4.0 & higher
Smart Phone System Requirements
- 6 -
Account Registration and Login
Please register an account with a valid email address. After
registration, check your email box to complete email
verification, and then tap "Verified" to log in.
- 7 -
Please pair the watch with your phone in the Letsfit app,
NOT in the Bluetooth settings of your phone.
1. Enable the Bluetooth of your smartphone.
2. Open the Letsfit app on your smartphone and go to the
"Settings" page, tap "+ Pair new device".
3. Tap "IW1", and your smartphone starts scanning.
4. Select the watch language on the watch and enter the QR
code interface as instructed.
5. Use the Letsfit app to scan the QR code displayed on your
watch to connect the watch to your smartphone.
Pair the watch with your
smartphone in the Letsfit app
Do NOT pair the watch
with your smartphone
in your phone’s
Bluetooth settings
iOS Android
Pairing the Watch with Your Phone
- 8 -
1 2 3
+ Pair new device
IW1
Notes:
● You can also search this device in the app to pair (Go to
"Settings" page → "+ Pair new device" → "IW1" → tap "Search
Devices").
● Once the watch is connected to your app, the watch will
automatically search and reconnect itself if the connection is
lost or when Bluetooth is restarted after manual disconnection.
● If you unpair the watch with the app, the information on the
watch will be reset and the watch will be restarted. Please do
not unpair the watch with the app unless there is an issue that
will require a reset.
● The watch can only pair with one smartphone at a time. When
pairing, please ensure the watch and your smartphone is
within 0.5 meters distance.
- 9 -
App Interfaces
Activity
Swipe down
to sync data.
Swipe right and
choose a date to
view data.
Daily Target Value
Daily Workout
Minutes
Daily Steps
Daily Active Hours
- 10 -
Training
When you start a sport mode on
your watch, detailed data and
graphs will be displayed here
after the exercise is over (swipe
down to sync data first).
Tap "IW1", you can
customize call / message /
alarm alert or set other
parameters.
Settings
****
-11 -
Getting to Know Your Watch
Basic Operation
Watch Interfaces
This is a touch screen; swipe the screen to go to different
interfaces, and tap to enter the function.
The home screen is a clock. On the clock:
● Swipe up to see the quick settings bar (do not disturb, wrist
sense, night mode, settings).
● Swipe down to see notifications.
● Swipe left to the function list, including workout, today, heart
rate, blood oxygen, breath, timer, stopwatch, alarm, music
control, and settings.
● Swipe right to view today’s daily activity data (You can
customize this interface in the Letsfit app. Go to the "Setting"
page → "IW1" → "Control Center".)
10000
10
● Turn on / off the watch:
Press and hold the function button for 3
seconds.
● Wake a dimmed screen:
Press the function button or turn your
wrist towards you.
● Return to the previous interface:
Press the function button or swipe the
screen to the right.
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10000
10
FRI
Today
5000
/10000
After the watch is paired with your phone, the home screen will
display the time and date.
You can customize the home screen by following the steps below:
Method 1:
1) Go to "Settings" → "General" → "Watch Face" on the watch.
2) Swipe the screen to choose a watch face and tap to confirm.
Method 2:
1) Open the Letsfit app, go to the "Settings" page → "IW1" →
"Watch Faces". Select a watch face and then choose the
information you want to display on the home screen.
2) Tap "Confirm" to finish setting.
10000
10
FRI
10:10 am
Twitter
Tom
The weather this
week has been
mostly cloudy, Take
an umbrella.
- 13 -
Function Introduction
Tracks your exercise
data in up to 14 sports
modes. Choose the
mode that you want to
start on the watch.
Tracks your
real-time heart rate
automatically and
continuously.
Measures your
blood oxygen level.
Guides your
breathing for a
relaxation.
Customize your
timer.
Check your daily
activities and
sleep data.
Use the stopwatch to
make your exercise
more standardized.
Set different types
of alarms in the
app to make the
watch vibrate to
remind you.
Control the music
playing of your
smartphone.
Some basic
settings and
information of
the watch.
O
2
- 14 -
1. Tracking Sports
The watch tracks your exercise data in up to 14 sports modes.
Start a sport
Tap "Workout" → Swipe the screen to select a sports mode
you want to start.
During sports
Swipe the screen up or down to flip through
exercise data. Swipe the screen to the left
so you can control the music playing on
your phone.
End the sport
Press the function button and tap " " to end the sport.
Exercise data is displayed after the exercise has ended. Swipe
up the screen to flip through exercise data:
GPS connecting (Only for Outdoor Run / Outdoor Cycle / Outdoor
Walk modes)
When you start an outdoor sport, the watch
begins searching GPS signal. Please let the
Letsfit app run in the background and allow
the location services on your phone, then
move to an open area and stand still to
better receive the signal. After the GPS is
connected, tap " " to start the exercise.
When the GPS signal is weak, you can start
Outdoor Run, Outdoor Cycle, Outdoor Walk
in non-GPS mode. Your movement route
will not be displayed in your training record
after the exercise is ended.
GPS connected
Outdoor Run
Failed to connect to
GPS, Start in Non-
GPS mode?
165
00:30:20
10'06"
/mi
08:30
mi
3.1
08:30
Paused
Duration
00:30:20
2020/08/30 08:00
Outdoor Run
Distance
3.1
mi
- 15 -
Notes:
● After ending an exercise, you can
view detailed data and graphs in the
app (Go to the "Training" page, swipe
down the page to synchronize data,
and tap the exercise you just ended).
● After you finish the outdoor cycling,
outdoor running or outdoor walking
exercise in GPS mode, your
movement track will be displayed in
the app (Go to the "Training" page of
the app, and then tap on the exercise
you just ended to view).
● Data of exercises less than 2
minutes will not be saved.
● When the battery level is less than
10%, the watch enters low battery mode, in which you cannot
start a sports mode. Please charge the watch to operate it again.
2. Tracking Daily Activity Data
The watch tracks your all-day activity data, including steps, distance,
calories burned, sleep, and workout data.
Today
5000
/10000
5.0
mi
350
kcal
Calories
08
hr
28
min
Sleep
3. Monitoring Heart Rate
After entering the heart rate interface, the watch tracks your
real-time heart rate automatically and continuously. You can view
your detailed heart rate data on the watch screen or in the app.
78
bpm
6h
12h
18h
159
100
42
149
52
Heart Rate
- 16 -
Note:
To monitor heart rate more accurately, wear the watch on the
upper position of your wrist and a bit tighter than usual when
you exercise. In addition, complete your profile in the app.
4. Measuring Blood Oxygen Level
Before measuring, wear the watch a finger-width below the wrist
bone and a bit tighter than usual.
1) Tap "Blood Oxygen" to enter the blood oxygen level detection
mode.
2) When measuring, keep your arm flush with your chest and the
watch screen facing up. Keep your arm still to ensure the
accuracy of the data.
Measuring
…
Sleep Detection Mode: If you want the watch to track your
blood oxygen level during sleep, please open the Letsfit app,
go to the "Settings" page → "IW1", and turn on the blood
oxygen measurement switch. The blood oxygen data will then
be displayed in the app (Go to the "Activity" page → "Sleep
Schedule").
- 17 -
5. Breathing Guide
Swipe the screen of the watch to enter breathing mode. Select
the duration of the breathing training and follow the instructions
to breathe. If you want to end the breathing training, press the
function button, or swipe the screen to the right.
7. Controlling Phone Music
After the watch is connected to the Letsfit
app on your phone, tap "Music Control"
on the watch to enter the function and
control the music playing on your phone.
6. Setting Alarms
1) Go to the "Settings" page in the Letsfit app and tap "IW1".
2) Tap "Alarm" to enter the alarm setting interface.
3) Tap "Add" to add an alarm.
4) Set the alarm time, name, vibration period and repeat time.
Choose to turn on/off the smart wake mode or the snooze
mode.
5) Tap "Confirm" to save your settings.
Note:
You can only control the music player that’s running on your
phone.
Breath
Stopwatch
Timer
Alarm
00:59
inhale
07:00
am
Get up
Everyday
Alarm
06:35
Alarm
Weekend
am
You can enable / disable the alarm on your
watch (Tap "Alarm" on the watch and turn
on/off the alarm you set.)
Music Control
- 18 -
8. More Functions
8.1 Call Notification
When there is an incoming call, the watch vibrates
to alert you, and the screen displays the caller ID.
Tap " " on the watch screen to reject the call.
Tap " " to turn on vibration-free mode.
8.2 Message Notification
When messages (like Facebook, Twitter, and
Instagram messages) come in, the watch vibrates
to alert you, and the screen displays the message
content.
8.3 Sedentary Reminder
The watch vibrates to remind you to get up and move around
when you have been sitting too long (Go to "Activity" page →
"Active Hours" → "Sedentary Alert Settings" → enable the
movement reminders function and set the remind interval.)
1-954*******
Incoming Call
Notes:
● Only when "Notification alerts" is enabled in the app ("Settings"
page → "IW1" → "Notification alerts"), will calls be notified.
● When the "Do not disturb" function is enabled in the app
("Settings" page → "IW1" → "Do Not Disturb") or on the watch
(Quick settings bar → ), calls will not be notified on the
watch during the do-not-disturb period.
Notes:
● Only when "Notification alerts" is enabled in the app ("Settings"
page → "IW1" → "Notification alerts"), will messages be notified.
● When the "Do not disturb" function is enabled in the app
("Settings" page → "IW1" → "Do Not Disturb") or on the watch
(Quick settings bar → ), messages will not be notified on the
watch during the do-not-disturb period.
8.4 Stopwatch
1) Tap "Stopwatch" to enter the function.
2) Tap " " to start.
10:10 am
Twitter
Tom
The weather this
week has been
mostly cloudy, Take
an umbrella.
- 19 -
8.5 Timer
1) Tap "Timer" to enter the function.
2) Choose the countdown time or customize your timer.
Basic Specifications
Model No.: IW1
Sync: Bluetooth 5.0
Screen: 1.4" TFT LCD
Battery Capacity: 250mAh
Working Voltage: 5V-500mA
Working Temperature: -10℃ to 40℃
Weight: 1.2oz (34g)
Waterproof Rating: IP68
Working Time: 5-7 days
- 20 -
FAQs
Failure to re-pair the watch with the Letsfit app on your
smartphone
1. Swipe the screen of watch to enter settings mode. Tap
"System" and choose "Reset". The information on the watch
will be reset and the watch will be restarted.
2. Select the watch language on the watch and enter the QR
code interface as instructed.
3. Use the Letsfit app to scan the QR code displayed on your
watch to pair.
If you still fails to connect the watch to the app, please kindly take the
following steps:
1. Make sure your smartphone’s Bluetooth is enabled and make
sure the watch is not connected to other smartphones.
2. Search this device in the app to pair (Go to the "Settings"
page → "+ Pair new device" → "IW1" → tap "Search
Devices").
3. Make sure the distance between your smartphone and the
watch does not exceed 0.5 meters and keep the watch
screen always on when pairing.
Occasional failure to connect with Bluetooth
Reboot your smartphone or restart your smartphone’s
Bluetooth.
Failure to receive SMS / calls notifications
Calls / SMS notification function works when the watch connects to your
smartphone via the app. Please kindly refer to the following tips:
1. Go to your smartphone Settings, find Letsfit app, enable the
Location and all Notifications.
2. Enable your phone’s Bluetooth and go to the Letsfit app to
pair the watch.
3. Open the app. Go to the "Settings" page → "IW1" →
"Notification alerts", turn on "Notification alerts".
4. Make sure the "Do not disturb" function is not enabled in the
app or the watch.
- 21 -
The watch is disconnected from the Letsfit app on your
smartphone
The watch will disconnect from your smartphone in the following cases:
1. Smartphone Bluetooth is off or exceeds the Bluetooth
connection range (the maximum Bluetooth connection range
is 10 meters and can easily be reduced by walls, furniture,
etc.)
2. The Letsfit app is closed on the phone. (This can occur
automatically under certain circumstances.)
To reconnect the watch to your smartphone, please kindly take the
following steps:
1. Go to your smartphone system Settings, find the Letsfit app,
and enable the Location and Bluetooth.
2. Clear all running / background processes on your smartphone.
Open the Letsfit app, go to the "Settings" page, tap "IW1", and
then the watch will reconnect to your smartphone and update
data. You can also restart your smartphone and Bluetooth,
then re-pair the watch in the app.
Blood Oxygen Level Measurement Accuracy
The Blood oxygen level will be affected by factors such as
motion, watch placement on the wrist, skin temperature and skin
perfusion. These factors will cause fluctuations in blood oxygen
measurements.
For a single measurement on the watch, please wear the watch
a finger-width below the wrist bone, snug but comfortable on
your wrist. When measuring, stay still and make sure your wrist
is flat with the watch facing up. If you are sitting, you can rest
your arm on a table with the watch facing up. For sleep blood
oxygen detection, please wear the watch snugly but comfortable
on the wrist when sleeping.
The smart watch blood oxygen sensor isn’t a medical device and won’t
be able to diagnose or monitor any medical conditions. If there is a
problem with the measurement, we recommend you consult your doctor.
- 22 -
Warranty
We strive to build our products with the highest attention to
detail and craftsmanship. However, sometimes there are
occurrences of a defect, so we are happy to offer a ONE-year
hassle-free warranty on all our devices as we continue to
make amazing products. Please contact us if you have any
questions about our devices.
Important Safety Instructions
The device contains electrical equipment that may cause
injury if not used properly. For example, prolonged contact
may contribute to skin allergies for some users. To reduce
irritation, please read the safety guidelines on the following
pages to ensure proper use and care.
● Do not expose your device to liquid, moisture, humidity or
rain while charging; do not charge your device when it is
wet, as this may result in electrical shock and injury.
● Keep your device clean and dry. Do not use abrasive
cleaners to clean your device.
● Consult your doctor before use if you have any preexisting
conditions that might be affected by using this device.
● Do not wear it too tight. If your device feels hot or warm, or if
it causes any skin irritation or other discomforts, please
discontinue using your device and consult your doctor.
● Do not expose your watch to extremely high or low
temperatures.
● Do not leave your watch near open flames such as cooking
stoves, candles, or fireplaces.
● This product is NOT a toy – never allow children or pets to
play with this product. Always store the product out of the
reach of children. The devices themselves or the many
small parts they contain may cause choking if ingested.
● Never try to abuse, crush, open, repair or disassemble this
device. Doing so will void the warranty and can result in a
safety hazard.
● If any parts of your product require replacement for any
reason, including normal wear and tear or breakage, please
contact us.
● Do not use your device in a sauna or steam room.
- 23 -
● Dispose of this device, the device’s battery and its package in
accordance with local regulations.
● Do not check any notifications, GPS, or any information on
your device’s display while driving or in other situations where
distractions could cause injury or hazard. Always be aware of
your surroundings while exercising.
Battery Warnings
A lithium-ion battery is used in this device. If these guidelines
are not followed, batteries may experience a shortened life span
or may cause fire, chemical burn, electrolyte leakage, and/or
injury.
● Do not disassemble, modify, remanufacture, puncture or
damage the device or batteries.
● Do not remove or attempt to remove the non-user-replaceable
battery.
● Do not expose the device or batteries to fire, explosion, or
other hazards.
Health Warnings
● If you have a pacemaker or other internal electronic device,
consult your physician before using a heart rate monitor.
● The optical wrist heart rate monitor emits green light and
flashes occasionally. Consult your physician if you have
epilepsy or are sensitive to flashing lights.
● Always consult your physician before beginning or modifying
any exercise program.
● The device, accessories, heart rate monitor, blood oxygen
level measurement and related data are intended to be used
only for general fitness and wellness purposes, not for
medical purposes, and are not intended to diagnose, monitor,
treat, cure, or prevent any disease or condition.
● The heart rate and blood oxygen level readings are for
reference only, and no responsibility is assumed for the
consequences of any false readings.
● While the optical wrist heart rate monitor technology typically
provides the best estimate of a user's heart rate, there are
inherent limitations with the technology that may cause some
of the heart rate readings to be inaccurate under certain
circumstances, including the user's physical characteristics, fit
of the device, and type and intensity of activity.
- 24 -
● The smart watch relies on sensors that track your movements
and other metrics. The data and information provided by these
devices are intended to be a close estimation of your activity
and metrics tracked, but may not be completely accurate,
including step, sleep, distance, heart rate, and calorie data
and blood oxygen levels.
● If you have eczema, allergies or asthma, you may be more
likely to experience skin irritation or allergies from a wearable
device.
● Whether you have the conditions above or not, if you start to
experience any discomfort or skin irritation on your wrist,
remove your device. If symptoms persist longer than 2-3 days
of not using your device, contact your doctor.
● If you sweat for more than two hours while wearing your
watch, be sure to clean and dry your band and your wrist to
avoid skin irritation.
● Prolonged rubbing and pressure may irritate the skin, so give
your wrist a break by removing the band for an hour after
extended wear.
Maintenance
● Regularly clean your wrist and the smart watch, especially
after sweating during exercise or being exposed to substances
such as soap or detergent which may adhere to the internal
side of the watch.
● Do not wash the watch with household cleanser. Please use
soapless detergent, rinse thoroughly and wipe with a soft
towel or napkin.
●While the watch is water resistant, wearing a wet band is not
good for your skin.
● If your bands get wet—for example after sweating or
showering—clean and dry them thoroughly before putting
them back on your wrist.
● Be sure your skin is dry before you put your bands back on.
● Do not bring your device into contact with any sharp objects,
as this could cause scratches and other damage.
● For light-colored arm bands, minimize direct contact with
dark-colored clothing, as color transfer can occur.
