Support MP3 format, playing power on automatically, LED indocator light when module is working.; With MicroUSB power connector, power supply or USB mobile charger powered via phone lines, but also can be 3.7V lithium battery, USB 5V power supply.;
Power Supply: 3.7 - 5.5V.
Note: 1 "long press" time is about 2S. 2 If you use U disk mode, some suggestions of 5V power supply, some U disk doesnt support 3.7V power supply.; Support TF Card (mobile phone memory card), U disk playback mode With the speaker terminals without welding.; Can be set button single /whole song, " default power up the whole song cycle, replacing the circulating mode by pressing the "Repeat" key.