I probably had the same one you had, I had the Garmin RV 660LMT with I damaged (totally my fault). I replaced it with the Garmin RV 760LMT with Wireless Backup Camera. The new model has added a lot of useful features that the 660 did not have. I suggest that you check out the new model.
I damaged my Garmin RV 660LMT (totally my fault and replaced it with this, It has a lot of improvements over the older model
Product Packaging: Standard Packaging
7" Display - With a big, 7" high-resolution touchscreen Display, RV 760LMT is easy-to-see inside vehicles of every size
Lifetime MAPS - Businesses open and close. New roads are built. Drive knowing your routes reflect the latest map data available from Garmin
Customized RV Routing - Enter your vehicle's height, weight, length and width. RV 760LMT will guide you along the most suitable routes for most major roads and highways, avoiding RV-related restrictions, such as low bridges
Garmin Real Directions - Garmin Real Directions with Garmin Real VoiceTM guide like a friend, using landmarks, buildings and traffic lights, rather than hard-to-read street names
BCTM 20 Wireless Backup Camera - Transmits images Wirelessly, up to 45 feet, to your RV 760LMT Display, so you can easily spot vehicles, and obstacles (Professional installation recommended. Extension cable may be required for vehicles longer than 45 feet)