[chejars]

There is usually already the adapter for the cigarette lighter, with a radio frequency that you look for on the radio and hear it

The problem is that they are emitters of low frequency and you will have interference if you move too much, it helps to remove the antenna from the car if you use it and you move several miles so that you do not have interference, they are usually worth about € 10

only interference i've had has been from other people using the same frequency as me on their FM modulators 😀 no need to remove the antenna unless you get issues with the modulator
but yeah fm modulators are definitely worth, especially on opels / vauxhalls, as the infotainment centers are rather made for fm radio