The tiny NavAlert unit has an LED display on the front of the unit, which provides additional information to the voice announcements. While driving normally it will display the current speed. When a warning is triggered, a chime is heard followed by an announcement such as "camera ahead limit 60" , the speed limit at the camera site will flash , before going back to displaying the vehicles speed. This will typically happen at 500 meters from the camera position, . A second chime is heard at 200 yards from the camera site, and if the vehicle is still over the speed limit, a continuous warning is heard "reduce speed" + warning sound until the vehicle speed drops to the speed limit, or the camera site is passed at which time a all clear chime is herd.
