User’s Manual
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Bluetooth MP4 player
Model Number: MP390B
Preparation before use
Exterior view
M key: refers to the Menu key. The menu will pop up after pressing this key, and then enter
the next interface after confirming (Enter or Exit). Hold the key to go back to the main
interface.
1、 key: choose the previous option or file.
2、 key: choose the next option or file.
3、 key: refers to the Play/Stop key, playing the role of confirmation also.
4、 V key: quick press to ‘Return’, press and hold it to enter Volume adjustment mode,
Switch on/off
Push and hold the Power button ‘ ’ on top of the player for 3 seconds to turn on, press
and hold this button again to turn off.
When the idle time of the system reaches the off time customized by the user, the player
will automatically be turned off.
Note: When the player is connected to a PC or being charged, this function is
invalid.
Low battery
When the battery power is low, the prompt screen will appear and then the player will
automatically shut down into the sleep mode. It should then be charged instead of
restarting it.
Note: When charging the player, be sure to switch the Power switch to
the ON position, or charging will not occur.