It is designed to invert 12 VDC to 120 VAC. It is 85% efficient with 2 AC outlet. Measures 18.43 inch length x 10.35 inch width x 4.16 inch height. Features low input voltage warning alarm, short circuit, ground fault, over loading and reverse polarity protection. AC power is available from a NEMA-20R GFCI duplex outlet on the front panel.