With this USB car dual charger, you can easily charge your iPad, tablet PCs, and most USB devices such as mobile phones, navigation systems, MP3 players, and digital cameras via the car's cigarette lighter! The USB car charger operates with input voltages of 12 V and automatically converts them to 5 V for USB devices. This allows you to charge your USB devices conveniently while on the go in your car, truck, or boat – without needing a PC, laptop, or power outlet. When combined with the vent mount for vehicles, you can securely attach a phone measuring between 5.5 and 8.5 cm while charging. A great set for a mobile lifestyle!.