US Patent 7180428 Compact radar vehicle speed monitor

A display indicates speed in GREEN when the approaching vehicle is traveling below or equal to the user set compliance speed. The primary display flashes RED when the approaching vehicle is exceeding the preset compliance speed. A rear mounted control panel and LCD display is provided for easy entry of compliance speed, operational settings and data recovery. The rear control panel is used for the following: set compliance speed; set max speed cutoff; retrieve traffic count; retrieve average speed; retrieve number of violations; retrieve maximum speed recorded; display battery status. Automatic dimming of the primary display is provided during night use.