These systems are becoming widely used, especially for construction equipment where there is no cab on the vehicle and the driver/operator can fall off, resulting in serious injury or even death.
The idea is that health and safety officers/inspectors can see if a seatbelt is being worn as the green beacon will flash. These devices are for off highway applications in the main as the green beacon is used on highway by doctors.
Suitable to be used with the 311.009/LEDG - Dun-Bri Group Green Valueline LED Beacon.