Double decoding music supporting MP3/WMA/WAV/FLAC/APE format; Support wired wireless microphone; with recording function, recording microphone sound; with digital tube display Support TF card, support USB(U disk); power-off memory function. support 5-10 meters distance infrared remote control operation; Support external audio input LINE IN Support FM radio, radio frequency band (87.5 MHz-108.0 MHz); Keys: six keys, mode/prev/scan/next/rec/mic; Power amplifier: 2x10W, rechargeable lithium battery 7.4V/DC 9V Charging voltage dc9v; With reverberation, high and low adjusting knob and microphone volume knob. Description of recording function: 1. Press the REC button briefly to start recording, and press the REC button again to cancel the recording function; 2. long press the SCAN button to play the recording file; 3. When recording, you must connect a storage device, such as a U disk or TF card. Key operation details: 1. MODE button: switch between USB/SD/FM/audio input/Bluetooth functions in turn. 2. PREV button (previous song/volume reduction): in MP3 state, short press of PREV is the previous song and long press is the volume reduction; In FM state, short press is to upward adjust a station number; Under the Bluetooth function, short press is the last song of Bluetooth, and long press is the volume reduction. 3. SCAN button (Play/Pause /FM Retrieving): In MP3 state, short press of SCAN is play/pause; In FM state, short press means play/pause, and long press means automatic closing and coexistence; Under the Bluetooth function, short press is play/pause. 4. NEXT button (NEXT song/volume increase): In MP3 state, short press of Next is song, and long press is the volume increase; In FM state, short press means downward adjustment of one station number; Under the Bluetooth function, short press is Bluetooth song, and long press is the volume reduction. 5. REC button: press REC button briefly to start recording, and press REC button again to cancel the recording function. 6. MIC button: microphone mode priority button. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Colour:Black Material:Plastic Package Contents: 1 * Amplifier Board Kit Only 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.