Working Voltage: 3.7V Lithium Battery 600MA or 5V USB Power Supply
With Power supply, it can play Automatically
With Multifunction LED indicator
Supports MP3 format playback
Supports USB audio mode
Support MP3 format, playing power on automatically.
When mp3 is played the red LED flashes.
Support U disk (test 32G), TF Card (test 16G) play mode;Â power on default.
Buttons can be adjusted up and down to control songs, volume up and down, pause or play, mode switching.
Press menu button enter the single / all song play mode.