USB Car Charger,super Fast Universal Portable Mobile Phone Car Charger,3.1a Dual USB Port Cell Phone Charger (Black) Dual USB car charger, the dual smart USB ports quickly and easily identify your mobile devices, to provide optimal charging efficiency automatically; FAST charging Dual USB ports: With up to 2.1A current output, the charger is capable of simultaneously charging two large tablets at maximum speed. Dual USB ports: Input: DC 12-24V; Output:DC 1A/2.1A Systems module Multi-safety: Intelligent circuit design protects against short circuiting, over-heating, over-currents, and over-charging. Charging stops when battery is full. USB car charger adapter charges your Pad from any standard cigarette lighter in any vehicle.