Function introduction: 1. LCD screen display2. Support Bluetooth calling function (Bluetooth version 5.0)3. Dual decoding MP3, WMA, WAV, FLAC, APE lossless format music4. Read USB disk5. Read SD card6. Radio FM7. External audio source input LINE IN8. Infrared remote control9. Power-off memory10. Power supply 12V audio card reader board11. Shell size: 112*62*22MM The main function: 1. Decoding supports MP3, WMA, WAV, FLAC, APE lossless format music;2. LCD screen display, lyrics display synchronously;3. Support Bluetooth call function, Bluetooth version 5.0;4. Support recording function;5. Support SD interface;6. Support USB interface (U disk);7. Power-off memory function;8. Support infrared remote control operation at a distance of 10 meters;9. Support external audio source input LINE IN;10. Support radio FM, search frequency band (87.5MHZ-108.0MHZ);11. Buttons: six-button multi-directional control, REC / REPEAT / VOL- / AUTO / VOL+ / MODE; Key operation details: 1. REC: Press the REC button to start recording, press the REC button again to cancel the recording function and play the recording file; when recording, it is necessary to connect a storage device, such as: U disk or TF card;2. REPEAT: Press the single loop function once, press it again to cancel the single loop, and play it in sequence;3. PREV button (previous song/rewind): in MP3 state, VOL-short press is the previous song, long press is fast rewind; in FM state, short press is to move up a station number; in Bluetooth function, short press Press for bluetooth previous song.4. AUTO button (play/pause): in MP3 state, short press AUTO to play/pause; in FM state, short press to play/pause, long press to automatically close and save the station; in Bluetooth function, short press to play / Pause.5. NEXT button (next song/fast forward): in MP3 state, short press VOL+ for the next song, long press for fast forward; in FM state, short press for down one station number; in Bluetooth function, short press Next song for bluetooth.6. MODE button: switch between USB / SD card / FM / audio input / Bluetooth function in turn. Recording function description: When recording, it is necessary to connect a storage device, such as U disk or TF card;