I’ve owned Rocky Mountain Radar products since 1989 , these things work awesome Don’t believe the BS reviews from Radar Roy and also Vortex , these guys are bought & paid for by Passport ! I’ve had at least 8 of these in all different model #’s , the last few being RMR 475 , the Judge & now the Judge 2.0 , love them all & don’t ever like to drive without them. Rocky Mountain Radar Customer Service is as great as their products , Don’t waste your time with those other brands out there , like Valentine , Bell , Passport , Escort , they will warn you when you just got your next Ticket !! By far the best on the market , I haven’t had a ticket since the late 1980’s and I swear by these products !