It is designed to invert 12 VDC to 120 VAC. It is 85% efficient with 2 AC outlet. Measures 10.87 inch length x 9.47 inch width x 3.23 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.