MP3 Module: Hiwonder Programming Music Player Module/Support TF Card/MP3 WAV DecodingDescription Sending the command via I2C communication to MP3 module for playing music and choosing previous next options. It's user friendly and has 30 levels of adjustable volume. The 4PIN connector is easy for wiring. It supports MP3, WAV and WMA hardware decoding, TF card driving, FAT16 and FAR32 file system. For more information, refer to https: www. hiwonder. com. cn store learn 52. html. Dimensional Diagram Supply voltage DC 5V Communication