http://www.radarscramblers.com/product_phazer.htm
I used to have one of these, but sold it with the truck. Look araound for more up to date ones.. I used to like seeing the Cocoa Beach Police give me a look as I sped by them. They knew I was going faster than I should but couldn't see it on the radar.
It doesn't work as well if you round the curve and the LE pings ya at close range I think it was less than 150 feet. And of course nothing can out do the Vascar that our Highway patrol uses in FL.
There is alot to look at if you google...