Dimensions: 106*25 (mm) USB: Connect U disk (maximum support 32GB) LED color screen: digital screen display, display red Infrared receiver module TF: Connect TF memory card (maximum support 32GB) AUX: Audio input interface VOL-: Short press is to select the previous song; long press is to decrease the volume PLAY/PAUSE: Short press is to switch between pause and play; long press is to radio FM automatic station VOL+: Short press is to select the next song; long press is to increase the volume MODE: USB/TF/FM/LINE IN/BLUETOOTH sound switching Main control IC: AC6926 Bluetooth IC: AC6926 Bluetooth version is 5.0 Music format: MP3 / WMA / WAV / FLAC / APE lossless format music Power: 2*3W, connect 2 3W speakers Radio FM frequency: 87.5-107.5 MHZ Support function introduction: support MP3/USB/TF/LINE IN/FM/BLUETOOTHemote control connection/DC 12V About the structure: Panel size: 107 * 25 MM, the two corners of the panel and the position of the screw holes, and then the lid cover surface, the depth of the board is 32 MM Recording function description 1. Long press the MODE button to start recording, and long press the MODE button again to cancel the recording function; 2. Long press the PLAY/PAUSE button to play the recording file; 3. When recording, you need to connect a storage device, such as U disk or TF card;