I found 1 still in a box and hooked it up in my car and it actually works well . Here in Pennsylvania K band is used by State and Local Police so it makes for a good Radar D . I found out from a former Cop that only K band is used in PA . So it is not only good for a paper weight as I read elsewhere ! If I lived in Texas , then I would use it as a paper weight . It all depends on what state you live and what Band is being used by Law Enforcement ! Any thing made by Cobra is always GOOD ! Oh , Yes , I did answer my own question , thank you :) .

Like I stated Ken . Here in Pennsylvania K Band is used , tried it today on the Inter-State and it went off and I slowed down , sure enough there was a Patrol Car 200 down the road ! My paper weight works fine for me here in PA . Not going to Jersey any time soon , don't need to ! I'd rather have my paper weight than nothing at all ! Thank you Ken ! Happy with paper weight Cobra 2100 ! Still works fine .