Colour: Black Shell size: length 90 * width 47MM; depth: 28MM Function introduction: LCD screen display, with Bluetooth call and recording functions; decoding MP3, WMA, WAV, FLAC, APE lossless format music / reading USB disk / reading TF card / FM radio / external audio source input LINE IN / infrared remote control / power off memory/12V power supply Button 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. VOL-button (previous song/volume down): In MP3 state, VOL-short press is the previous song, and long press is for volume down; in FM state, short press is to increase a station number; in Bluetooth Under the function, a short press is the last song on Bluetooth, and a long press is for the volume to decrease. 4. AUTO button (play/pause): In the MP3 state, short press AUTO to play/pause; play / Pause. 5. VOL+ button (next song/volume increase): In MP3 state, VOL+ short press is the next song, and long press is for volume increase; in FM state, short press is to adjust down a station number; under Bluetooth function Short press for Bluetooth next song, long press for volume down. 6. MODE button: switch between USB / TF / FM / audio input / Bluetooth function in sequence. Description of recording function A storage device must be connected when recording, for example: U disk or TF card