The 500Watt power inverter works well for people who live on the road and are always on the go. The 500-watt power inverter allows users to power any AC device on the road, as it plugs into a car's lighter, or optionally, directly to the car battery itself. This means users can power a laptop, cell phone charger,, and other small electronic devices easily. In addition, the inverter features two USB ports, to allow users to charge USB devices as well.