ITEM NAME:1Pcs 30W+30W Dual Channel Stereo High HD Digital Audio Power Amplifier THV NHN Descriptio n Description: Input voltage: 8 V-26 V Amplifier type: Class D Number of channels: two channels Output power: 10W+10W Output impedance: 4ÃŽ ©-8ÃŽ © Efficiency: up to 90% Sound quality: much less than 10% distortion. Protection: Output short circuit protection, over temperature protection. The function is self-recovering Specifications: Material: PCB Color: Dark Blue Size: 4.3*5.5*1.4cm Package Included: 1* High-definition Digital Audio Power Amplifier Board Note: Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! 1Pcs 30W+30W Dual Channel Stereo High HD Digital Audio Power Amplifier Board.Amplifier type: Class D. 1 High-definition Digital Audio Power Amplifier Board. Number of channels: two channels. Sound quality: much less than 10% distortion. Output power: 10W+10W. We want to make sure you are happy with our item.