Description: 2*30W Class AB Automotive Grade Amplifier Supply voltage: DC9-18V, 12V is recommended Output power: can be connected to 4-8 ohm speakers Maximum 2x35W stereo (18V4 ohms) Input method: 3.5mm audio input / 3P expansion input port Protection: power input reverse protection, short circuit, over current, overheat Potentiometer knob opening: 7mm High-grade pure black immersion gold circuit board, imported audio capacitors, dual-port large-capacity filter capacitors per channel Package Includes: 1Piece TDA7377 Stereo Amp Note: Please press the PCB board to indicate the wiring, the power supply can not be connected to the channel terminal, and the wrong connection will burn the IC