The Duracell 400-Watt High Power Inverter boasts two 3-prong AC outlets and one USB port. This high-power inverter will convert your vehicleâs power to household power for small appliances and hand tools. Capable of powering most 115V AC devices, such as small appliances, TVs, and laptops, and its 2.1 Amp USB port efficiently charges your smartphones and tablets. Includes two 3-foot power cables for convenient connectivity. The power plug connects to your car’s power socket for everyday use with items under 175 watts, and the battery clamp cable connects directly to your car battery for high-power applications over 175 watts.