RX75 represents the ultimate in discreet protection from traffic radar and laser. A sophisticated, exterior mounted system of radar and laser technology is the perfect compliment to any performance vehicle. Fully featured with the latest features and functions, RX75 delivers true road confidence. RX75 Plus adds Laser "Blocking" and moreThe RX75 Plus adds laser "blocking" ability, an amplified speaker for Digital Voice alerts, concealed LED display, and in-dash trim bezel.