Many cars do not come with USB connectors in the rear passenger area. However, this option can be very useful on long journeys. The device is an extension cord that plugs into the cigarette lighter socket. Thus you get a USB and type-c slot directly in the cigarette lighter itself and a block with support for fast charging, which is extended by a cable to the rear passengers. There are also two USB and two type-c connectors on the unit with Power Delivery support. It can be used in both 12 and 24 volt vehicles.