This inverter provides 150 watts continuous power and 500 watt peak surge power. Allows you to convert 12-volt vehicle battery power into 115 volts of AC power. Has 2 grounded AC outlets and a 12v cigarette lighter plug. You can use the inverter in your vehicle to operate many types of appliances that use AC power such as TVs, VCRs, portable computers, power tools, and lights for emergency or camping use. The inverter works with your vehicle’s engine turned on or off (accessory mode). Optimum Efficiency: 90%. Built-in surge protection allows for sade car startup and shutdown. Fits all standard vehicle cigarette lighter sockets. Low battery shutdown when DC voltage fails. Overload protection and indicator.