The CPI-490 is one of the most compact 400 Watt power inverter in the market. This inverter provides 400 Watts continuous and 800 Watts peak when connected directly to the vehicleâ€™s battery. It converts battery power to a 120V AC outlet, allowing you to power up office equipment and household appliances that draw up to 400 watts from your car, truck, RV or boat. It also includes a 2.1 Amp USB port, ideal for using and charging most small gaming systems, tablets, mp3 players, mobile phones, and many more USB power management devices. The unit includes a cigarette lighter cord for 150 Watt capacity and direct-to-battery cables for a full 400 watts.