STANLEY PI500S PowerIt 500-Watt Power Inverter

500 watts of continuous household power on the go; Up to 140 watts through car's 12-volt DC outlet; Dual 120-volt AC outlets and dual high-output USB ports (3.1 amps shared) can charge/power multiple devices at the same time; Connects with 12-volt DC plug or can be connected directly to battery with battery terminal clamps; Durable, injection-molded polymer housing built to withstand rugged use; Power button and automatic low-voltage cutoff preserve vehicle's battery, preventing total battery drain; Includes battery clamps, DC plug, and 4 installation mounts;