Martin Ranger 2.1-Amplifer Dual USB Car and Home Charger Plugs directly into your Cigarette Lighter 12V accessory socket or AC Wall Outlet Charge iPod, iPhone, iPad + many other USB devices (using your own USB cable) Fold-Flat, non-polarized blades for compact storage Output: 2.1 amps for each USB port (5 volts @ 2.1amp) AC Input: 100-240 Volts, (50/60Hz), DC Input: 12-24 Volts