500 Watt High Efficiency Full-Range Class D Design 2-OHM Stable Stereo Amplifier International Rectifier® Chip Set Ultra Low Current Draw Double Sided Copper Plated PCB Flipped Conformal Coated PC Board PWM MOSFET Power Supply Digital Sound Optimization Circuitry High Damping Control Circuit High Current Voltage Ripple Rejection Circuitry 3.5mm AUX Input Remote Soft Delay Turn On/Off Circuit Variable Low/High Pass Electronic Crossover Variable 12dB Bass Boost EQ Variable Gain Control Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output.