This little USB adapter puts out a full 1 amp of current from both ports. Most other car chargers say they are 2.1a, but they split the difference between the two ports - this one gives you full power to both ports! Everybody needs one of these in their car, they sure come in handy when you and a friend both need a charge at the same time. - Dual USB ports to charge two devices at the same time. - Compatible with all mobile devices. - Input: DC 12V-24V - Output: DC 5V / 2A 10W