Product Category:Class D stereo amplifier Operating voltage: DC7-30V Output power: rated power 2x85W(4ohm) Load can be connected to 3/4/8/16 ohm speakers Maximum power 2 * 105W (4ohm) Performance indicators: Efficiency: 92% Total harmonic distortion plus noise: Less than 1% Gain: 34db Low quiescent current Noise suppression Protection function: Power input reverse protection Overcurrent protection Overheat protection Under-voltage/over-voltage protection Input mode: 3.5mm audio input, 3P_2.54mm Wiring terminal audio input Indicator status: (I) power normal operation (2)alarm sound distortion (3)error trigger protectionblack Colour:black Material:plastic 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.