Just plug the Travelers Adapter into the wall outlet and plug your car charger into the Adapter. Type: Power Module Specifications: Charges Cell Phones or SmartPhones Can also be used to charge other 12VDC devices Powers 12VDC devices from 110VAC wall outlet Input 110VAC, 60Hz Output 12 VDC, 0.5 Amp Works with all 12V DC car chargers Car chargers not included