VG-2 AlertTM Invisible to VG-2 radar "detector detectors" and provides an alert when VG-2 is in use. Safety AlertTM Warns drivers of emergency vehicles, road hazards or approaching trains equipped with the Safety AlertTM transmitter. Separate visual and audible alerts for all three signals. Voice AlertTM Separate voice identifications of all speed monitoring and Safety Alert signals. Voice or tone selectable. LaserEyeTM Provides 360° Laser Protection.