The CPS150CHU power inverter converts 12V DC automobile power to standard 120V AC home power - up to 150 watts. Simply plug the inverter into a 12v DC outlet (cigarette lighter outlet) and you re ready to go. It s the perfect solution for powering electronics anywhere a 12V power source is available. It also has full-time surge protection that guards against power fluctuations from vehicle startup and shutdown. The CPS150CHU is ergonomically designed to fit in any standard sized cupholder (for convenient placement). The 36 tangle-free cord is equipped with a 2-in-1 auto/airline connector so you can power your electronics on the road in the air or on your boat. It not only has a standard 3-prong home outlet but comes with a pass-through 12V DC cigarette lighter port so you can utilize the 120V AC home power and 12V DC cigarette power at the same time. It also includes a USB port for changing your mobile electronics.