This portable USB charger charges 2 USB devices at the same time, delivers up to a maximum shared output of 12W. One for Two - Charges 2 USB devices at the same time. Rapid Charge – Each port supports max 5V/2.4A rapid charging. Product total output up to 12W. Travel Ready – With a palm size, this charger is the ultimate travel companion. Superior Safety – Multi-protect safety system prevents overheating, overcharging, and short circuits.