Detailed description:
1) Master: Actions 3315D, memory: magnesium original
2. Support audio format: MP3, WMA
3. Signal to noise ratio: 85dB
4. Working temperature: 0-50 degrees Celsius
5. Waterproof level: IPX68
6. Power supply: built-in polymer rechargeable battery, battery specifications; 041235, battery capacity, 120 mAh
7. Appearance size: 64 × 26 × 12mm
8. Bare metal weight: 16g
9. Weight after packaging: 30g
10. Outer box size: length 42.2 × width 27 × height 60cm
11. Net weight: 8.95Kg, gross weight: 9.95Kg
12. Material ABS+pvc
13. Accessories: 1 waterproof earphone; 1 3.5USB cable; 1 English manual

Functional operation:
1. Power on/off/pause: Press the POWER/PLAY/PAUSE button to turn on the power, the playback indicator lights; in the playback state, press the PLAY button to enter the pause/play cycle.
Press and hold POWER/PLAY/PAUSE for 1.5 seconds to turn off the camera and the playback indicator will go out.
2. Forward/Backward: Short press PGUP or PGDN button to advance or rewind the song to select play.
3. Volume plus / volume reduction: Press and hold the PGUP or PGDN button to gradually adjust the volume to the appropriate listening volume.
4. File download/upload: Insert the USB download cable DC end into the MP3 host headphone/USB download interface, and plug the other end into the PC's USB port. At this time, the LED indicates that the U disk icon is displayed in the lower right corner of the computer. The DC end of the line is plugged into the host headphone/USB charging interface, and the other end is plugged into the USB port of the PC or the USB port of the dedicated charger. At this time, the LED is illuminated to download and upload the file.
5. Charging: Plug the DC end of the USB download cable into the host headphone/USB charging port, and plug the other end into the USB port of the PC or the USB port of the dedicated charger. At this time, the LED is on.
, indicating that the charging is normal; the charging time is generally 

30 hours. (Note: The LED light is flashing when the PC is charging, and only the charging indicator state when the professional charger is connected; after the charging is finished, the LED is still on, and it is transferred to the MP3 playback state. If you don't want to play, please hold down the POWER button for 2 seconds to turn off the power.)

important hint:

    To charge or download songs from your MP3 player, plug in the MP3's headphone jack port (fully plugged in) using the USB cable plug, then connect the computer/AC high current charger or data transfer. Incorrect connection methods may cause damage to the MP3 player.