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 cigarette lighter in your car, truck, or boat. The USB car charger operates with input voltages of 12 and 24 V and automatically converts them to 5 V for USB devices. This allows you to conveniently charge your USB devices on the go in your car, truck, or boat – without a PC, laptop, or power outlet. Thanks to its high output power and 2 USB ports, you can charge two USB devices simultaneously.