This remote fits perfectly with (supposedly) all Becker 5 inches Navis (in my case Professional 50 LMU). Simply replace the charging cable and insert the battery in the remote control - already everything works. There are no dislocations to operate longer necessary with skillful placement of the FB. In particular, the telephone calls over the Navi is considerably simplified. Prefer not to miss it, the comfort with this supplement is near a fixed installation unit of the new generation with the benefit of free map updates. All around recommendable. Kulik