Bradychan&reg; Replacement Adapter 12V 2A Black Magnetic Car Charger For Microsoft Surface Pro Surface Pro 2 Tablet (Pro Car Charger) 100% Brand New Car Charger DC Power Adapter . Prevents overcharging and overheating Easy to operate just plug the car charger into your car`s cigarette lighter Intelligent IC chip inside recognizes a full battery and automatically switches to a saver mode Input: DC 12-24V 50/60Hz Output:DC 12v 2A