Charge two devices at once. Gecko in-car duo-charge allows you to charge your iPod in your car, boat, caravan or anywhere else you have a 12v power outlet.The duo-charge comes with Gecko's unique dual head cable system which includes a mini USB connector to charge some mobile phones and other devices. For example, you can charge up to two iPods at the same time, one with dock connector, one with an iTrip connected, or an iPod and a mobile phone.