The inverter converts 12VDC automobile power to standard 120VAC home power - provide 150 watts for AC device. Simply plug the inverter into a 12VDC outlet (cigarette lighter outlet). It is equipped three 120V outlets for running AC devices at the same time, and also has a convenient USB port for charging smart phone, USB output current can support to 2.1A charging Mobile Phone. It is the perfect device to power all your mobile/consumer electronics, small appliances, emergency equipment, and portable tools.