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We have the model #'s 7725 and 7735. Jim has one in the truck and I have one in my car. Unfortunately they don't seem to make that model anymore. We have had good luck with ours, never has it directed us on roads that we shouldn't be on or dead ends.
The RVND 7 looks like ours and the functions look the same. I'm not sure if it has the lifetime updates that ours do.
You do have to keep it plugged in when you travel. It doesn't hold a battery charge for an extended time.
Before a trip Jim also looks up our route on goggle maps and follows the route too..
Hope this helps..
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