Description:2x30W Class AB Automotive Grade AmplifierSupply voltage: DC9-18V, 12V is recommendedOutput power: can be connected to 4-8 ohm speakers Maximum 2x35W stereo (18V4 ohms)Supply method: 3.5mm audio input / 3P expansion input portProtection: power input reverse protection, short circuit, over current, overheatPotentiometer knob opening: 7mmHigh-grade pure black immersion gold circuit board, imported audio capacitors, dual-port large-capacity filter capacitors per channelPackage Includes:1 x TDA7377 Stereo Amp