The Nature Power 400-Watt Pure Sinewave Inverter converts 12V DC power into 120V AC power and is great for running small power tools, TVs, computers, and much more. It features high surge capacity for loads that are difficult to start and the filtered sinewave output eliminates distortion for sensitive electronics. Includes USB port that allows you to charge phones and other devices. Additional Features • Protections include overload & high temperature shutdown. over-voltage, low voltage alarm and low voltage shutdown