Garmin Auto Suction Cup Mount with Speaker - Universal GPS Holder for Car Dashboard - Perfect for Garmin Nuvi, DriveSmart & DriveAssist Models - Secure Hands-Free Navigation While Driving

Really makes my Montana a great navigation device for my off road vehicles. With the power connection and speaker, I like using this for navigation better than using my nuvi. If you are going to use your Montana in the car, on or off road, this is essential because otherwise your batteries will go dead over the course of a day. Also, running off batteries will not give you as much screen brightness as on the car battery power. I love this solution for my back roads, trails, and highway. I never have to worry about dead batteries, and I can take the Montana out of the car when I am hiking and the batteries are always charged and ready to go.2/17/2016 Update: I have read several reviews where they say the suction cup isn't strong enough to hold the Montana unit. I have experienced a few times when mine dropped off, but it has either been the fault of a dirty windshield or a dirty suction cup. Whenever I wash the windshield and the suction cup with cleaner, then rinse them both with water and let them dry, I get great adhesion. I use my Montana on some of the roughest Jeep trails Utah has to offer, and as long as I use my routine, the GPS stays put. In fact, I think I will buy another mount so I won't have to switch the mount to my other vehicles as often.