I went to get a new cell phone at my local audio place, you know the kind, where the rice boys hang. Any way I saw this product called Blinders. It came with two units rear and front and it wires into a switched power source and stays on.
It supposedly inteferes with laser type speed acquiring devices. It's made in Europe, Scandinavia I think. The instructions said to test, look through a cam corder view finder to see if the units are emitting light.
Snake oil or what?