Product name: HiFi version 50W+50W Bluetooth stereo digital power amplifier board Product model: XY-AP50H Power supply voltage: above 5~27V DC/2A Bluetooth version: 5.0 Cool function: support Sinilink-APP control Color: black Material: PCB+ metal Product scheme: original 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: encoder volume adjustment, smooth feel, one-button switch Transmission distance: more than 15 meters (no blocking) Heat dissipation mode: pure aluminum heat sink+shell 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 Ω/8 Ω Output power: 10W x 2@12V 8Ω,20W x 2@12V 4Ω 20W x 2@18V 8Ω,40W x 2@18V 4Ω 30W x 2@22V 8Ω,50W x 2@21V 4Ω Product size: 60 x 60 x 16mm Package Contents: 1 x XY-AP50H 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.