As of 2020, it happens that the power supply of the portable detector from the 12V socket does not work in some BMW car models. The sockets are atypical and some universal power adapters do not work in them. In this case, there are several solutions: The first is the power cable to the USB-C socket, which most of these cars have. Now we also sell a power cable with a USB-C end. The second and more elegant option is a cable for fixed installation, which powers the detector directly from the fuse box and is hidden in the interior of the cabin (we are happy to arrange the installation and it takes about 30 minutes).