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      04-23-2012, 01:33 PM   #3
rondocap
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Drives: 335i Sedan
Join Date: Feb 2012
Location: NY/NJ

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Nope, they actually block the laser signal and jam the laser gun. Then when you've slowed down enough, you turn it off with a switch and the laser gun gets a read on your now (slower) speed.

It's legal in most states, you'd just have to check if it is in yours.