The Retractable Apple iPod/iPhone Car Charger accepts DC input from 12 to 24 volts and provides 1 amp of rapid-charge power output. Charges all iPod and iPhone models (except Shuffle). Features a built-In retractor that extends 26-inches and retracts with the push of a button. To unwind the cable grab the charger in one hand and with the other pull out enough cord to allow for easy movement. The cord will lock into position. Plug the Retractable iPod Car Charger into the cigarette lighter/power-port of your car. Plug the connector-end into your iPod/iPhone. To retract the cord, push the button on the side of the charger and the cord will retract.