Auto Power Inverter w/USB PortConvert your vehicle power outlet into a powerful 90W outlet. Built-in USB port offers added convenience of charging compatible devices on the road. Protect devices from the elements and electrical circuits with over temperature, over current and short-circuit protection. Compact size allows for charging and powering your notebooks and USB devices simultaneously. Adapter/Charger Type: Plug Adapter/USB Charger; For Device Type: Notebook/USB-Powered; Power Source(s): 12 Volt Vehicle Outlet.