True sine wave inverter is designed to invert 12 VDC to 230 VAC. It is 90% efficient with 2 GFCI Outlet. Measures 3.5 inch height x 8.7 inch width x 12.2 inch length. It has 540 Watt output rating and 1200 Watt surge rating. Features over-voltage and under-voltage protection, over temperature shutdown, automatic overload protection, short-circuit protection and ground fault protection. Includes remote panel and transfer switch. It is remote on/off capable.