Supports MP3 format, turns on automatically, and features an LED indicator light when the module is in operation. Includes a MicroUSB power connector, can be powered via a power supply or USB mobile charger using phone cables, and also supports a 3.7V lithium battery or USB 5V power input.
Power Supply: 3.7 - 5.5V.
Note: 1. "Long press" duration is approximately 2 seconds. 2. When using U disk mode, a 5V power supply is advised, as certain U disks do not support 3.7V power input. Supports TF Card (mobile phone memory card) and U disk playback modes, with speaker terminals that need no soldering. Playback mode can be set to single track or whole song; the default is whole song cycle upon power-up, and the cycling mode can be adjusted by pressing the "Repeat" key