A USB extension with a separate charging current is ideal for connecting to multimedia devices (such as a ceiling monitor) that have a USB socket for playing media, but when connecting a hard disk, the existing USB power is weak and the disk does not start. Plus and minus are connected to the car's mains (both 12V and 24V are supported), and the USB extension socket outputs a stable 5V max at 2.1AMP.
Can also be used simply as a USB charging port, charging your phone or even a tablet. There are several options for installation, it can be completely recessed or, in addition to the cigarette lighter, it can also be installed under the dashboard using the supplied clip.