Care And Maintenance
• Turn OFF the YD-V31 when not in use
• Do not let the YD-V31 be in contact with liquid as it is
not waterproof. Avoid putting it in places where there is
excessive moisture and humidity
• Do not expose the YD-V31 to direct sunlight nor place
in areas with high temperature, as it may result in an
explosion
• If the YD-V31 is not in use for a prolonged period, store in
a cool, dry place, free from moisture, humidity and dust
• Do not use abrasive cleaning solvents to clean the YD-V31
• Do not expose the YD-V31 to contact with sharp objects
as this will cause scratching and damage
• Do not stick anything inside the YD-V31 as this may
damage internal components
• Do not attempt to disassemble the YD-V31, as it does not
contain serviceable components
• Only charge the YD-V31’s built-in battery in accordance
with the instructions of this user guide
• Do not disassemble the device as it may expose you to
dangerous voltages or other risks. Incorrect reassembly
can cause electric shock when the YD-V31 is subsequently
used
• Avoid charging the YD-V31 in extremely high or low
temperatures
• It’s recommended to charge the YD-V31 immediately
whenever low battery power is encountered to prolong
durability & standby time of battery
Troubleshooting
If you are unable to hear the person on the other line clearly,
do the following steps while conversation is in ongoing:
• Adjust the volume to maximum in your YD-V31 or
• Request the person on the other line to adjust his/her
mobile phone volume to maximum
If there is a strong echo resounding from the person on the
other line:
• Transfer the call to mobile phone
• If echo disappeared, transfer the call again from mobile
phone to YD-V31 and lower the loudspeaker volume until
echo is eliminated
• If the echo still remains, this means the echo is generated
by the network service provider or mobile phone itself
If the speaker volume of the YD-V31 is too low or too high and
seems impossible to adjust it:
• Adjust the volume directly on the phone
• Fine tune it using the volume control of the YD-V31
If the YD-V31 charging indicator is not lighting up or the
device is not charging:
• This happens when the battery is completely depleted and
if the device is not used for a while
• The red LED may take awhile to light up and start
charging
• Leave the device plugged and charging for about 4 hours
to completely charge the device
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