Instructions for use: 1. Press the on/key to turn on, the red LED indicator flashes after turning on, and the MP3 player starts to play music automatically 2. Shut down: Press and hold the on/off key for about 5 seconds and then release it until it automatically shuts down or waits for one minute. The MP3 player will play the previous song next time you start it. 3. Pause: Press the play button to pause Mp3 playback for one second, the machine indicator light is on, but not flashing 4. Next song: short press the next song button; previous song: short press the previous song button; volume +: short press the volume + button; volume -: short press the volume-button FM radio mode: When the mp3 player is in mp3 play mode, please press the play button to pause, press and hold a song or the previous button until the indicator light flashes, the MP3 player will search for radio stations automatically. In FM mode, press the play button to exit FM mode and return to mp3 playback mode. Specification: -Waterproof: 3m waterproof -Audio format: MP3, WMA, VBR, AAC -Memory capacity: 8GB -System support: Windows/MAC OS system (genuine) -PC interface: USB 2.0 -Power supply: Built-in 3.7V lithium polymer, rechargeable 160mA battery -Play time: about 4-6 hours after full of continuous music -Charging time: about 2 hours -FM radio: 87.5-108.5MHz -MP3 host size: 6*1.5*2.6CM -Bracket size: 13*12*1.5CM -Weight: 110 grams