1.3-in-1 charger is great convenience for user which including travel charger, Car charger, USB retractable cable . 2.Travel charger input voltage AC100-250V, European and American standard plugs are available . 3.Car charger input voltage DC12-24V, suit all Car cigarette Lighter . 4.USB input voltage DC5.0V ,suit the port of computer. 5.Charge at home ( with AC100-250V ) , charge on car ( with cigarette lighter port ), charge on computer (with USB port ) are available . 6.Retractable cable is easy to carry which can stretch and shorten.