1. Support MP3 format, playing power on automatically, LED indocator light when module is working.
  2. 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.
  3. 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.
  4. Support TF Card (mobile phone memory card), U disk playback mode With the speaker terminals without welding.
  5. Can be set button single /whole song ," default power up the whole song cycle, replacing the circulating mode by pressing the "Repeat" key.