1. Support MP3 format, playing power on automatically.
2. When mp3 is played the red LED flashes.
3. Support U disk (test 32G), TF Card (test 16G) play mode; power on default.
4. Buttons can be adjusted up and down to control songs, volume up and down, pause or play, mode switching.
5. Press menu button enter the single / all song play mode.
