Product model: XY-C100H Product name: Bluetooth digital power amplifier board Number of channels: left and right channels (stereo) Adapted horn: 0W~300W 4 8 16 Bluetooth version: 5.0 Power supply voltage: DC5~26V (the higher the voltage, the greater the output power) Transmission distance: 15 meters (no blocking) Protection mechanism: power reverse connection protection, short circuit protection, self-recovery overheat protection Product size: 70 x 65 x 18mm Presenting cool features: Mobile App control supports Android and OS Note: The output power of the power supply should be the output power of the power amplifier, otherwise the sound quality will be affected by 12V 8 /30W+30W, 4 /40W+40W 15V 8 /36W+36W, 4 / 60W+60W 19V 8 /64W+64W, 4 / 90W+90W 24V 4 /80W+80W, 2 /more than 100W+100W color:Black Material:PCB+Metal Package Contents: 1 x 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.