The CPS150BI Inverter converts 12v DC automobile power to standard 120v AC home power - up to 150 watts. Simply plug the CyberPower Systems CPS150BI Power Inverter into a 12v DC outlet (cigarette lighter outlet) and you’re ready to go. The convenient 180-degree swivel head is designed to fit in all universal cigarette lighter plugs. It is equipped with one 3-prong outlet and has built-in automatic shutdown to protect your vehicle’s battery. Full-time surge protection guards against power fluctuations from vehicle startup and shutdown, and its compact design is made to fit in tight areas. The CyberPower Systems CPS150BI Power Inverter is the perfect device to power all your mobile/consumer electronics, small appliances, emergency equipment, and portable tools.