This is a perfect power supply to test most high power car stereos, cellular phones, and other 12V devices that draw up to 10 amps. Features front mounted binding posts and a cigarette lighter jack for increased versatility. Heavy duty steel housing with short circuit and overload protection. Specifications: * Output Voltage: 13.8 VDC (fixed) * Output Current: 10 amps (cont), 12 amps (surge) * Ripple Voltage: Less than 1mV at rated output * Input Voltage: 120 VAC, 60Hz * Weight: 11 lbs.