Music format: MP3 / WMA / WAV / FLAC / APE lossless format Radio FM frequency: 87.5-107.5 MHZ Support function introduction: support MP3 / USB / TF / LINE IN / FM / BLUETOOTH / remote control connection / DC 12V About the structure: there are screw holes on both sides of the panel to fix the position, the depth of the panel is 23MM External Memory: Yes Battery Specification: External Power Function: FM Radio Bluetooth: 5.0 Battery Life: 20 hours Model Number: MP3 WMA Decoder Board Style: Car MP3 Operation Mode: Press Tone Supports FM: Yes Signal Noise Ratio: equal 89dB Infrared receiving module: TF: Connect TF memory card (maximum support 32GB, not included) USB: Connect U disk (maximum support 32GB, not included) LED indicator -: Short press is to select the previous song; long press is to decrease the volume PLAY/PAUSE: Short press is the switch between pause and play; short press in the radio FM state is automatic closing +: Short press is to select the song; long press is to increase the volume MODE: USB / TF / FM / AUX / BLUETOOTH sound switch colour:Silver black Material:Plastic + Metal size:88 x 27MM Package Contents: 1 x MP3 Decoder 1 x Remote Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.