Nilight Switch Panel System are All in one design for your ultimate convenience. This kit has everything you need for installation and use. No need to buy extra parts. Multi-position installation and wide application. with different brackets, it can be installed in any position you like. Automatic Dimmable Backlight for Driving Safer. On the road or other bright places, the switch panel will be brighter, so you can see it clearly. In the tunnel or other dark places, the switch panel will be dim, reduce the impact on the driver's vision