Product Name: 2.1 channel Bluetooth amplifier AMP Chip: 2*Professional Chip Max Output Power: 2*50W+100W Power Supply: DC5~26V Channels: 2.1 Output Impedance: 2~8ohm Working Type: Class D Audio Input: AUX / Bluetooth 5.0 / USB USB File: FAT32 32G Max Colour:black Material:Plastic + Metal + Electronic Accessories Package Contents: 1 x XY-S100L Bluetooth 5.0 Subwoofer Amplifier Board 6 x knob caps 1 x heatsink 1 x thermal silicone pad Note: different batches, the color of accessories may be different, it does not affect Only the above package content, other products are not included. Note: Light 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.