USB Car Charger Mobile Power Inverter Adapter DC 12V/14V Plug Outlet Converter New generic Universal DC to AC Outlet Converter Adapter Plus USB outlet. Converts DC power outlet into an AC power outlet (with DC power) for small electronic appliances. Just plug this inverter into any 12 volt DC power outlet, like those found in cars, RVs, or boats. Input: DC 12V / 500mA. Max output power: 5W.