http://www.technoscout.com/general/product/product.asp?product=185&Prod_Name=Phazer_II_Radar_Jammer&site=85870

Yes, please read what the people at www.radartest.com have to say about radar jammers here.

"Except for the Phantom, which contains rudimentary radar-detection circuitry, each is essentially an empty box with a 12-volt power cord, a cheap cast-plastic waveguide assembly, one or two front-mounted LEDs, a basic power-supply circuit and a button or two. Press the button and an LED lights up, accompanied by a tinny bird whistle. ("Our patented 'FM Chirp', " company salesmen proudly proclaim.) We've tested these products a dozen times against every front-line police radar gun and laser, finding all of them utterly worthless."

I actually bought one of these things to try it out. First the thing is huge, and I didnt personally like a gigantic black box sitting on my dash, and second it doesnt work that great, it may give you and extra 2 seconds to react to a radar gun, I had a cop buddy of mine help me test it out. So after a week it went back.

thanks guys