This converter makes it possible to use USA car radios in Europe and elsewhere, where even decimal radio frequencies are desired. (100.2 MHz for instance) It adjusts the MHz and can be turned off if not needed. This converter is for cars that have stand-alone FM-radios or stereos, not needed for radios where we do software modifications like MyGIG RER/REW and REN/REZ. It is attached along the antenna cable. It comes with a bypass filter allowing antenna boosters and power supply by the antenna cable.
The FM-radio converter comes with standard cables (fakra). If you car has other connector types, then you need to re-use the old ones. This may require soldering. Shipping outside EU may cost extra.