They banned them from AZ b/c they do in fact work, it reflects the light from the flashes away from the lens on the camera. I also have a friend who speeds everywhere and he gets away with it with his cover. I just throw them away, here in AZ they dont send them certified mail which means they can not prove you got so they can not hold you accountable. Over the last 4 years I have thrown 6 away and my license is clean as a whistle, you face up to them tho and you can face points on your license!!
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