Product name: HiFi Premium 50W+50W Stereo Bluetooth Digital Amplifier Board Product model: XY-C50H Power supply voltage: above 5~27V DC/2A Bluetooth version: 5.0 Presenting cool features: Mobile App control supports Android and OS Product scheme: TPA3116D2 (anti-interference high-efficiency Class D power amplifier) Number of channels: left+right channels (stereo) Input mode: Bluetooth+AUX+U disk+USB sound card Output mode: LC filtered output, HD audio quality Volume adjustment: adopt the rotary encoder used by the high-end speaker, infinitely adjust the sound, feel smooth, and start and stop with one button Transmission distance: more than 15 meters (no blocking) Heat dissipation mode: pure aluminum heat sink+ heat dissipation, large heat dissipation area, ensuring full power and high performance operation Protection mechanism: anti-static, anti-reverse connection of power supply, short circuit, overheating, overvoltage, undervoltage, DC protection Adapted horn: 10W~200W, 4 /8 Output power: 10W* 2@12V 8,20W* 2@12V 4 20W* 2@18V 8,40W* 2@18V 4 30W* 2@22V 8,50W* 2@21V 4 Product size: 58 x 52 x 19mm color:Black Material:PCB+metal Package Contents: 1 x XY-C50H power amplifier board 1 x DC adapter 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.