Main functions: 1. Decoding supports MP3, WMA, WAV, FLAC, APE lossless format music. Support radio FM, search frequency band (87.5MHZ-108.0MHZ)2. LCD screen display, synchronous display of . Power-off memory function3. Support Bluetooth call function, Bluetooth version 5.0. Support infrared remote control operation at a distance of 10 meters4. Support recording function. Support external audio source input LINE IN5. Support SD interface. Support USB interface (U disk)Buttons 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 once to repeat the single song, press again to cancel the single repeat, and play in order;3.PREV button (previous song/fast rewind): In MP3 state, -short press is the previous song, and long press is fast rewind; in FM state, short press is to move up a station number; in Bluetooth function, short press Press for the previous song on Bluetooth.4.AUTO button (play/pause): In the MP3 state, short press AUTO to play/pause; play / Pause.5. button ( song/fast forward): In MP3 state, + short press is the song, and long press is fast forward; in FM state, short press is to move down a station number; in Bluetooth function, short press song for bluetooth.6.MODE button: switch between USB / SD card / FM / audio input / Bluetooth function in sequence. of recording functionWhen recording, it is necessary to connect a storage device, such as: U disk or TF card;Does not contain 2 x AAA batteryMaterial: Plastic+electronic componentscolour: blackPackage Contents: 1 x decoder board1 x remote control(Does not contain 2 x AAA battery)1 set cablesOnly the above package content, other products are not included.Note: Light reflection 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.