The hole pattern of the base plate fits TOMTOM Rider I + II and Garmin Zumo 500 + 550 and many more. As well for all RAM Applications and our GPS-Cases
The additional adapter kit GPS.00.085.10000/B is necessary for Garmin Zumo 340 / 350.
To use GPS devices made for cars, it is advisable to fix a splashproof GPS Bag to the base plate