Power inverter,small in size,can transform on-board DC to ACIt is very easy to use.No refitment to car.Put one of its connector into car lighter plug and then plug the electrical apparatus into the power inverter plug.It is applied to digital camera,laptop.MP3,electronic shaver, cellphone charger,etc.It can bring lots of convenience to you when travelling or working in car. We can offer all kinds for plug styles. Further more information on our products, welcome to contact us freely.