CTYRZCH Bluetooth MP3 Decoding Board Module w/ SD Card Slot / USB / FM / Remote Decoding Board Module M011 Notice: This is the MP3 Decoding Board with TF Car Slot. Don't buy it by mistake. Support USB/TF Card Slot/Bluetooth/FM/AUX switching, also supports folder selection and playback Stereo Bluetooth with a call can also receive hands-free calls DIY speakers and modified audio / car rare weapon Support MP3/WMA/WAV/FLAC/APE format music.