Some do not. We do not provide these products. About 40 US States, and many other countries use Laser. The Laser Shield has proven highly successful. Not at all.
Plate numbers stay visible.
It does not obscure view of the license plate in any way. In simplified terms, laser radar sends out an infrared beam at a wavelength of 904nm. It is not visible to the naked eye, but is deadly to your car. The laser beam requires a reflective surface on your car to get a good reading. Tht Laser Shield diffuses the laser beam over the license plate, which is usually the most reflective, perpendicular, and best metallic surface to bounce the laser beam off.