400 Watt continuous; 1000 Watt peak surge power ideal for road trips or every day use, this inverter can easily transform your AC items into 12 Volt DC items. Also includes cables to attach unit directly to battery. No installation required, simply plug in and use run and charge 110 Volt equipment in your vehicle USB power ports to charge and power cell phones, MP3 players, and other USB appliances. Can operate with the car engine turned off. High peak wattage for sensitive electronics. Auto reset short-circuit protection, Overload protection and low battery shutdown. Specifications: true-rated power: 400 Watt continuous, peak surge power: 1000 Watt, USB output: 1.0, no load current draw: less than 0.75 Ampere low battery alarm: 10.5 Volt to 0.5 Volt auto low battery shutdown: 10.5 Volt to 0.5 Volt, thermo protection cooling fan, AC outlet: 2 USB power ports: 2 cables included, net weight: 19.4 ounces. Dimensions: 3.9 inches by 6.5 inches by 1.9 inches.