Earphone
USB Socket
ON/OFF
Switch
Pre./REW
Next/FF
Vol+
Vol-
Bulit-in Mic
Screen
Speaker
Play
REC
Stop
Menu
Previous / Next
Fast Forward / Rewind
Volume Change
ON
OFF
Turn ON
ON
OFF
PLAY
Fast Forward/Volume Adjust
REC
SAVE
Press and hold
Tap it
REC Light
Music.mp3
Push Up the ON/OFF button, turn on device
Press REC, start to record Press STOP, save recording Press PLAY, play the file just saved
①Connect to Cpmputer
②Backup File to Computer
USB
RECORD
Full Charged Battery Low
Delect File
Selection Return Confirm
By the 3 buttons, easy to set the recorder
Delete file
Connect to Earphone Data Transfer
MUSIC/RECORD Folder Switch
Delete File
ChargingMenu Options
Menu options
Play setting
Folder view
Record Settings
System setting
Exit
Operating
Delect File
Tap UP/DOWN to
select a file to delete
Select, and tap M
Select, and tap M
Select Yes, and tap M
1）Set time and date: by pressing UP/DOWN to adjust, by tapping
VOL+ to select, and tap the M button to confirm setting
2）Restore to Factory Setting: turn on the device, Press Play (turn on
device) -> hit M -> use Up/Down to System Settings -> hit M -> to
Factory Setting, hit M -> Select Yes, hit M to confirm
Restores to factory default. Very helpful if confusion arises when
creating settings.
3）Format Device: will erase all data, do not use it, unless in need.
Note: Do not turn off power when formatting device. If, unfortunately,
the devise is mistakenly cut off, it will show as disk error.
To correct disk error.
Push down the power button from ON to OFF position. Connect the
device to a Windows computer, and format the disk from the computer
to return to normal state.
Note: If you are using a MAC computer, please contact our customer
support. Reformatting on a MAC computer needs different options.
4）Unless storing the device, we recommend you keep power button
at ON position, turn on/ off the device by pressing down the PLAY
button.
Important Notice:
Register VIP: http://www.evistr.com/vip or email
[email protected] to register VIP within 30days and receive an
extended 18 Month Product Warranty.
Download More User Guide from http://www.evistr.com
Music.mp3
Music.mp3 Music.mp3
Music.mp3
Delect File
Press and hold STOP button,
switch between MUSIC and RECORD folder
EVISTR L157 User Manual
Thank you for purchasing a recorder from EVISTR.
Customer satisfaction is our priority. If you have ques-
tions or problems, please feel free to contact to us.
- Our web site:
http://www.evistr.com
- Register as a VIP and receive an extended 18 month
warranty:
www.evistr.com/vip
- Our customer support email:
support@evistr.com
- Keep this booklet for future reference. You may also
download detailed instructions from our web site.
http://www.evistr.com
To Ensure Product Warranty
Confirm the package contains an authentic,
new device from EVISTR.
The original package comes film wrapped
and has bar code information.
Package List
·1 x L157 Device
·1 x Earphone
·1 x USB Cable (for data transfer and charging)
·1 x VIP Card
We highly recommend you register at our site to
receive an extended warranty (18months), to
verify the product authentication, and to have
better customer service. Registration is free.
Built-in Mic: Captures the voice and records. Do
not click on buttons when device is recording.
Earphone: You may plug in earphones to hear the
playback.
USB: For charging or to download recordings to a
computer.
POWER Button: Switch on/off device power (we
recommend you keep power button at ON position
unless storing the device).
PLAY/PAUSE: Play recordings or turn on/off the
device (while power button is at the ON position).
REC: Button for recording.
STOP: Save recording, stop playback。
M: Menu options. Use up/down to select, use M to
confirm. Press Stop to return to main menu
Speaker: Device has a built-in speaker. You can
hear the playback without earphones.
UP/DOWN: Selects Menu Options.
VOL+ / VOL- : Adjusts the speaker volume. When
setting date and time, use this button.
1
2
3
4
5
6
7
8
NO. Function
1 Battery Bar (when battery bar is empty, battery needs recharging)
2 Length of Recording in minutes/seconds
3 Speaker Volume
4 Recording format & bit rate
5 Remaining Recording Time (remaining capacity)
6 Recording Status
7 L / R Channel meter
8 Total Recording File Count
Turn ON device: Power button to ON position; press
PLAY button for two seconds to turn on the device.
Recording: press REC button to begin recording.
Save Recording: press STOP button to save
To select and confirm, press Menu (M) button.
Change Record Format/Quality: go to Menu (M) ->
Up/Down button to select Record Setting -> Recording
quality -> (1536kpbs WAV format, 128kpbs / 64kpbs
MP3 format)
Voice Activated Mode (AVR mode): go to Menu (M)
-> select Record Setting -> Up/Down button to Voice-ac-
tivated mode-> M button to select AVR mode -> select
ON.
Voice Activated Level: go to Menu (M) -> Up/Down
button to select Record Setting -> select Voice activated
1)Charging the device
Use the USB cable provided. Connect to a computer,
USB socket, or USB Adapter.
2) Download file to computer
Use the USB cable provided to connect to your com-
puter. Find the file (L157) on your computer. Drag &
Drop or Copy and Paste the recordings from the
recorder file to your computer and share with friends.
3) Turn on the recorder
When using the device for the first time, push up the
ON/OFF power button on the side of the recorder from
OFF to ON position. The device will boot up.
From then on, press PLAY button to turn ON/OFF the
recording device.
4) Recording
Hit REC button to begin recording. Press STOP to
automatically save recording.
5) Pause Recording
During recording, hit PLAY button to pause recording.
Hit PLAY button again to resume recording.
6) Play Recording
Once you have saved a recording, hit PLAY button
and play back what was just recorded.
7) Adjust Speaker Volume
During playback, use VOL+ / VOL- to
adjust speaker
volume.
8) Fast Forward / Rewind
During playback, press and hold Down (FF) to use fast
forward.
During playback, press and hold Up (REW) to rewind.
9) Previous / Next
Tap UP or DOWN to select, move to previous / next
recording file (or music track).
10) Play Music (use as MP3 Player)
Attach device to computer. Transfer music file from
computer to recorder. Detach device from computer
and turn on.
Press down STOP button and switch to music folder.
Note: the songs do not put inside the RECORD folder,
you could create a new folder for it.
11) Delete Recording
Turn on the device by pressing Play.
Press M (menu)-> find Delete File, press M again ->
select Delete ,press M -> select Yes, press M to con-
firm. File deletes.
NOTE: When turning on the device, we can press
Up/Down button to select file to Delete, in default, it
reads the latest file, so if we will
directly go to delete
option, it will delete the latest file.
12) A-B Repeat
When in playback, press down M button. A will flash
on the display. Press down M button again, and it will
show A-B on the display. The recorder will play back
recordings / music from point A to point B again and
again.
13) T-mark
During recording, press M button to add a T-mark to
the recording. A T-mark flag shows on the display. It is
same as adding a bookmark. Each recording file can
have ten T-marks at maximum.
If recording is played back, you will see the T-mark
flag on the display. Press DOWN (FF) to jump to the
next T-mark file point.
1 year warranty unless registered with Evistr VIP.
Product Warranty
Product Sketch
Learn how to operate the buttons in
the product sketch.
Quick Start Guide
Quick Menu Option Guide Using UP
/Down Button
DOs
·When you receive the recorder, we recommend that
you push the POWER button up to the ON position to
turn on the device. Unless storing the device, we
recommend you turn on/ off the device by pressing
down the PLAY button.
·Listen to a test file on the device to check sound
levels.
·Backup data as frequently as possible.
·Charge the device via its USB cable to a computer
or wall charger (charger input less than 5V 1A).
·When battery is low (battery bar empty), save
recordings and recharge immediately.
·The device supports charging and recording at the
same time.
·Remember to hit STOP and save your recording
each time.
·Device won’t make any noise during recording. It
will flash the Record LED light (this function can be
turned off).
·Keep this booklet for future reference.
·For any issues, problems, or questions, contact us
support@evistr.com
·Contact customer service with Order ID or System
Firmware Version Information, or Bar Code on the
package for a more effective reply.
·Register for VIP service within 30 days to receive
effective customer service and extend your record-
er's warranty to 18months.
DON’Ts
·Do not shut down the device’s power button when
it is saving a recording.
·Do not scratch the recorder body.
·If typing or writing near the device while record
function is on, it will capture the noise.
·Do not format the device unless the files have
been backed up.
·Do not cut off power while formatting device.
·Do not delete a file unless the file has been backed
up.
·Do not press any buttons when device is connected
to a computer.
·Do not use non-original micro USB cable to transfer
data from device to computer. Not all micro USB
cables support data transfer.
·Do not set View Playing unless needed. It only plays
10s seconds of each file.
·Do not use the Voice Activated Function unless
needed. It may not record some low decibel voice you
want recorded.
·Do not use the Auto Record Function unless
needed, as device will automatically boot up to record.
·Do not turn on the sleeper time function unless
needed, as this will force the device to shut down,
even if in use.
·Do not pause the device for a long time, as the
device will automatically shut down when there is no
operation such as playing or recording.
Important Notice for Using This Device
Basic Operation Guide
1.Play Settings
1.1Play Settings -> Play Mode
Press Play (turn on device)-> tap M -> use Up/Down
to Play Setting -> Play mode.
Use Up/Down to select Repeat.
Repeat off: select and confirm. Device playback is in
normal.
Repeat one: repeats single file again and again.
Repeat all: repeats all files in directory from A-Z again
and again.
View Playing: only play 10s seconds of each file.
Use up/down to select Shuffle.
Shuffle plays back files in random order. To stop
Menu Options
Operational Explanations:
Bulit-in Mic
Screen
Speaker
Play/Pause
（NO/OFF)
REC
STOP/SAVE
Mode（Menu）
REC Light
Earphone
USB
Power Button
Pre./REW/PRE
Next/FF/DOWN
Volume Button
FRONT
RIGHT LEFT
recording
Delete Recording: press Menu button. Select ->
Delete File -> select Delete. This deletes a single
recording. To delete all files, go to -> Delete File
-> Use Up/Down button to choose Delete All. Use
Up/Down button to confirm your choice.
Play a Recording: Choose the recording you
wish to hear by pressing Menu -> use Up/Down
button to choose, press PLAY.
Play Next / Previous Recording: press the
Up/Down button.
Fast Forward / Rewind: press and hold the
Up(REW)/Down(FF) button.
sensitivity -> select from levels 1 to 5.
Set Time: go to Menu (M) -> Up/Down button to
select System setting -> Up/Down button to select
Date and time -> select Set time -> use Up/Down and
VOL+ buttons to change time. Press M button to
confirm.
Set Date: go to Menu (M) -> Up/Down button to
select System setting -> Up/Down button to select
Date and time -> select Date -> with Up/Down and
VOL+ buttons change date, and press M button to
confirm.
These instructions will say “hit” or “press down.”
Hit: a short press of the button.
Press and hold: press the button a few seconds until
the screen shows the information.
Register VIP:
http://www.evistr.com/vip or email
support-us@evistr.com to register VIP and receive
an extended 18 Month Product Warranty.
1 2 3
5 6 74
9 10 118
Disk space: Device shows the free space and total
space.
Format Device:
This will format the disk and erase all data on the
device, so remember to back up important files before
doing.
Select Yes, press M (menu) confirm. Device will start to
reformat and erase all data. Wait until the device
reboots and completes the process.
Note: Do not turn off power when formatting device. If,
unfortunately, the devise is mistakenly cut off, it will
show as disk error.
To correct disk error.
Push down the power button from ON to OFF position.
Connect the device to a Windows computer, and
format the disk from the computer to return to normal
state.
Note: If you are using a MAC computer, please contact
our customer support. Reformatting on a MAC comput-
er needs different options.
Factory Setting:
Restores to factory default. Very helpful if confusion
arises when creating settings.
Select Yes, press M to confirm. Device will start to
restore factory settings.
shuffle, use Up/Down and select Off.
1.2 Play Settings -> Sound Setting
Press Play (turn on device) -> tap M -> use Up/Down
to Play Setting -> Sound Setting -> Equalizer.
Use Up/Down to select Rock, Pop, Soft, Jazz, Classi-
cal, Techno, Off.
2.Folder View
Press Play (turn on device) -> hit M -> use Up/Down to
Folder View -> RECORD.
Shows all files recorded on device.
3.Record Settings
Press Play (turn on device) -> hit M -> use Up/Down to
Record Settings -> hit M
Recording Quality: 1536Kpbs: default choice, loss-
less PCM quality, recording format at WAV (12 hours at
8GB, 24 hours at 16GB); 128Kpbs, 64Kpbs: record at
MP3 format.
Record LED: ON: default. LED indicator light is ON.
OFF: turn
off the LED indicator light.
Subsection record
Recorder will automatically save the recording file at a
selected time length and start a new recording.
Half Hour: record each file at 30minutes.
One Hour: record each file at 1 hour.
Two Hour: record each file at 2 hour.
CLOSE: turn off subsection record function.
Voice Activated Mode (AVR)
When AVR is on, device will record any voice. If no
voice is detected, it will not record to reduce blank time
and save storage space.
At AVR mode, we still need to press STOP to save
recordings when we complete a recording task.
AVR Mode
ON: turn on voice activated record function.
OFF: turn off voice activated record function.
Voice Activated Sensitive Level
From Level 1 to Level 5: Level 1 only picks up voice or
sound above 70db, a very loud sound. Level 5 is very
sensitive, so any quiet sound will be recorded.
(i.e. normal environmental noise will activate
recording).
Note
: do not turn on this function for important lectures
or meetings. It may skip or lose some very important
sentences at low decibels. Use regular on/record/stop
for meetings.
Record Monitor
ON: when ON, use earphones to hear what it is record-
ing.
OFF: turn off this function.
Exit:Exit current menu options, return to upper level
menu option.
4.System Settings
Menu Options -> Up/Down button -> System Settings
Sleep Timer:
This function will turn off the device at a set time, even
if it is playing or recording. Be careful in case you
unexpectedly lose an important recording.
Select from 10 minutes to a maximum of 120 minutes.
Backlight timer:
Set the time for the display to go dark.
Select from 10 seconds to maximum (always on).
Note: when display is always on, device will consume
a lot of battery power.
Brightness:
Set the display brightness from 00 to 15 (i.e. dark to
bright)
Date and time:
Set time: Press UP/DOWN t
o adjust hour or minute.
Press VOL+/VOL- to move to next hour or time.
Press M to confirm and save setting.
Set date: Press UP/DOWN to adjust year, month, or
day. Press VOL+/VOL- to move to next.
Press M to confirm and save setting.
Language: If, unfortunately, the device is set to the
wrong language, please contact customer service.
support@evistr.com.
Information
Player Information: Device shows the firmware version
and the release date.
13 14 1512
http://evistr.com/
Support@evistr.com
Technical Parameter
1)No Voice Recordings
If there is no voice recording or all recordings have
been deleted, when device is turned on it will display
“no voice recordings” or “no songs” on the screen. Not
to worry, go ahead and press REC or M (menu).
2)How to Turn Off the Record Light
Go to Menu Options -> Record setting -> Up/Down
button -> Record led -> select OFF. When recording,
the record light will not light up or flash.
3)Format Error
This usually happens because of three reasons.
During recording, pushing down the POWER
BUTTON to OFF position will cause file damage.
Before switching off recorder, first press STOP to save
the recordings.
The recordings time is less than 5 seconds.
Computer does not support the .wav file. The
recordings were saved as .wav format. For
WINDOWS 10 or MAC user who may encounter with
this issue, don't worry. Download the free MplayerX /
VLC Media Pla
yer to solve this issue.
http://mplayerx.org http://www.videolan.org/vlc/
Record at MP3 format, so recordings will be more
widely supported by different computers.
4)Disk Error
Due to static shock, like over charging, recorder cuts
off its power when the formatting process doesn't
complete, and device loses system firmware.
How to Rescue: Keep power button at OFF position,
connect device to Windows computer, and format the
recorder disk again. Device will be normal.
How to connect to a computer:
Use the enclosed cable to connect to your computer,
or use an android phone cable.
If device fails to connect to the computer, contact
support@evistr.com to get a quick solution.
Or, for the simple way, change to a new socket or use
a new cable. (For example, this issue also happens
when failing to connect a flash drive to a computer.)
5)Failed to Connect to Computer
Before connecting the recorder to a computer, turn off
the recorder.
When connecting to a computer, do not press any
buttons on the recorder or do any operations on the
recorder. Otherwise, it will exit connection mode, and
fail to connect to the computer. At this status, it will only
charge the voice recorder.
For more failed connect to computer issues, please
contact us. We will reply promptly.
6)Can Recordings Be Deleted from the
Computer?
Yes. When the recorder is successfully connected to a
computer, find it as the removable drive name “L157.”
All recordings are saved in a folder named “RECORD”
in the drive.
You may delete the file or copy the file onto an
ordinary USB Flash Drive.
7)When Connected to a Computer, the Buttons
Do Not Work
When connected to computer, the voice recorder is in
connection mode. The recorder screen will show
“CONNECTION ICON” and no buttons will work.
To restore button function, press M and hold. Device
will exit connection mode.
8)Cannot Find My Recordings in the Recorder
When first opened, the device will first read the Music
Folder. Press STOP to switch back to recordings
folder.
The recorder can also be connected back to the
computer to check whether there are recordings in the
recorder disk.
9)Turn On Voice Activated Function
Go to Menu -> Up/Down button to Record Setting ->
press M -> Up/Down to Voice Activated Setting ->
press M -> select AVR mode, and press M to confirm.
Now press REC. You will see VOR on the screen
which means voice activated recording function is set.
10)How to Use the AVR Mode (Voice Activated
Function)
When AVR mode is selected, the device will only pick
up a loud enough decibel sound or voice.
Adjust the voice activated sensitivity in record setting.
Select the AVR level to get the best effect for voice
activated recording.
For the L157 voice recorder, the AVR level can be
selected from 1 -5. The lower number requires a
higher decibel voice to activate the recorder. In other
words, a louder voice. At level 5, the recorder is very
sensitive and will pick up quiet speaking.
Note: When the voice activated function is ON, press
REC. Device will record 3 seconds to check if the
recorder is correctly entered into recording mode. It
will only pick up loud enough decibels of voice /
sound.
(11) Recorder Not Recording
Check to see if the recording light is blinking.
Additionally, see if VOR is on the screen.
If VOR is on the screen and light is blinking, it means
the voice activated function is ON. During this setting,
it will only record when a high enough decibel sound
is detected. You may go to Record Setting, find AVR
sensitivity, and adjust.
Turn off t
he AVR mode if this function is not needed.
(12) Why Does Recorder Playback in Random?
Go to Play setting, close the shuffle function.
(13) How to Use the A-B Repeat Function
During playback, press down M (menu). A appears on
the screen and B blinks. Recorder selected the start
point. Press down M again, select B. Now recorder
will playback between Point A to B.
(14) The Recording Has Unwanted Noise
Avoid recording near a computer, electric fan, air
conditioner, or sound bar that will cause noise. The
recorder will pick up this static noise.
(15) The Recorder Auto Shuts Down While
Recording
This happens when the sleeper time function is ON.
When operating the device, or recording, or playing
music/recordings, the sleep timer function will force a
shut down on the device.
Go to System setting - > sleeper time. Select OFF and
confirm. This closes the sleep time function.
You can also try to restore the recorder to factory
settings when this happens if you're not sure how to set
the sleep time.
(16) Cannot Shut Off My Voice Recorder
When the recorder is charging, or connected to
computer, even if the POWER BUTTON ON/OFF is at
OFF position, recorder will still be ON. The voice
recorder cannot be shut off because the voice recorder
is directly getting power from the charging socket or
computer.
(17) How to format the recorder
Press M (menu), enter menu options.
Select System Setting, press M to enter.
Select Format Device, Press M to enter.
Enter Format Disk, select Yes.
Press M to confirm and start formatting. After formatting
is completed, all files on the recorder will be deleted,
and all storage (8GB or 16GB storage) will be available
on voice recorder again.
Note: Do not shut off the device during disk format
(18) Space is full
TROUBLE SHOOTING
NOTE: This form shows the maximum recording file
time that can be stored in the device, not the battery
time, Device capacity is subject to the entity.
Recording Parameter
WAV
MP3
Recording
Quality
8GB
48 hours
580 hours
580 hours
2320 hours
32GB16GB
1536kpbs 12 hours 24 hours
128kpbs 145 hours 290 hours
64kpbs 290 hours 1160 hours
32kpbs
580 hours
1160 hours
Product
Dimension
Screen Size
USB Socket
Charging
Record Bit Rate
Earphone
Output
Memory
Battery
Music Playback
Battery Time
Max Recording
Battery
Support Music
Format
3.97 X 1.06 X 0.42 inch
(101X27X10.8MM)
96 x 64 LCD screen
USB 2.0 High Speed
(Charging and Data Transfer)
1536kpbs 128kpbs 64kpbs
Max 10mW+ (30Ohm), Freq 20Hz - 20KHz,
S/N ratio > 90db, Distortion factor 0.05%
8G / 16G / 32G
(Subject to the device)
3.7V 230mAH Lion Polymer
12 hours (single full charged with
earbud, screensaver)
Time Full charged, recording
at 64kpbs could work 20 hours
MP3 / WAV / FLAC / APE
/ OGG / WMA
Input < 1A 5V
When the storage space is full, connect to a
computer, copy recordings, and save them to the
computer. Delete all the recordings from the voice
recorder. The voice recorder has a limited storage at
8GB or 16GB. After a while of using, the recorder may
be full and needs to be backed up onto a computer.
Note: Do not cut off recordings from recorder to
computer. This will cause an unsuccessful transfer,
and the files cannot be deleted from the recorder
successfully.
We will regularly update our E-book, based on
customer feedback. We hope to have more
interaction with our customers, so please let us know
if we can help you. You may find more information on
our website:
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