Garmin RV 660LMT 6-Inch Navigator EASY ROUTE SHAPING- Easily modify your route to include preferred roads or cities, just by touching the screen ELEVATION PROFILE - Elevation map tool displays possible steep grades along your route CUSTOM RV ROUTING- Custom RV routing for the size and weight of your RV or towable trailer RV Parks and Services - Directory of RV Parks and Services; filter campground search results based on your preferred amenities ROAD WARNINGS - Road warnings for bridge heights, weight limits, sharp curves, steep grades and more