Passive Radar Scrambler Disables X, K & Ka Bands. Transmits Special Laser Beam That Confuses Radar Laser Detection Units Providing Protection From Front Only. Features On/Off Switch, Built In Diagnostics, 2-3 Mile Range And Compact Design (1.4" X 2.5" X 3.3"). Does Not Provide Alert Warnings That Radar Or Laser Is In Use.