So, what exactly is this new ZR4 Laser Defense System? This system essentially is a product which is designed to both reliably detect and counter police radar guns. The ZR4 system consists of two remote front mounted laser detector/shifter modules which both detect police radar guns and which emit shifted signals to confuse police radar guns.
The ZR4 system also includes a rear mounted laser detector/shifter module to protect the rear area of a car. This rear module is mounted directly above the rear license plate since police very commonly target the rear license plate area first when trying to acquire a car's speed reading using a laser gun.