The BLACK+DECKER PI500B power inverter delivers 500 Watt of practical household power you can transport using dual 120 volt AC outlets and dual 3.1 Amp USB charging ports. Simply plug the power inverter into your vehicle's DC plug (cigarette lighter) and plug your devices into the power inverter; perfect for charging small electronics like a cell phone, tablet computer, and other electronic devices. Features a fan free, silent running design and built-in battery protection where an audible alarm will sound if your battery starts running low; will not drain your vehicle battery, leaving you stranded. Inverter plug folds in, leaving the outlet covered when not in use. The BLACK+DECKER PI500B power inverter includes a limited 1 year manufacturer warranty.