The CPS175SU mobile power inverter converts 12v DC power to standard 175 Watts of 120v AC power. Simply plug the inverter into a 12v DC outlet (cigarette lighter outlet) and youre ready to go. It is equipped with two (2) NEMA 5-15R outlets for running multiple devices at the same time, and also has a convenient .5A USB port for charging smart phones, cellular phones, MP3 players, and digital cameras. It has Soft Start Technology that guards against power fluctuations from vehicle startup and shutdown. Its ergonomic slim-line, portable design and universal 2-in-1 auto/airline connector lets you power electronics on the road, in the air, or even on a boat. The CPS175U Mobile Power Inverter is the perfect device to power all your mobile/consumer electronics, small appliances, emergency equipment, and portable tools.