Model: 1002S Bluetooth version: 5.1 Power output: 100W+100W ( power) Audio input: Bluetooth+AUX+USB Power supply: DC 9-24V/5A or above U disk format: FAT32, Less than 32GB U disk music support format: WAV/FLAC/APE/MP3 Whether to support APP control: Yes Left and right channel output power: 2*10W@8Ω/12V; 2*30W@8Ω/24V 2*20W@4Ω/12V; 2*50W@4Ω/21V 2*70W@4Ω/24V; 2*100W@2Ω/21V Protection mechanism: overvoltage; overcurrent; undervoltage; clipping; short circuit; overheating and other protections Multi-function knob: 1. Single click: Pause/play 2. Double click: next song 3. Triple click: previous song 4. Quadruple click: switch input mode (Bluetooth/AUX/USB) 5. Five clicks: restore factory settings 6. Long : power on/off Product size: 95x60x23mm Colour:Black Material:ABS type:A: Without line Package Contents: 1 x Bluetooth amplifier board 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.