easy to install in the cigarette lighter port of your car, the extension car charger will offer you the power you need on the go. designed for 4 usb ports with 2.4a input each, it allows you to charge 4 devices at the same time and thanks to its extension, it is now easier to charge from the back seat. the car tellur charger identifies the devices and automatically adjusts the optimal flow for each device. it is compatible with most cars and digital devices and has built-in protection against overload and overheating. led indicator flashes blue when plugged in, ready to charge at any time.