^{_{Security workers protect people and property, maintain crowd control, patrol areas and check doors, gates and windows, watch for irregularities such as fire hazards, leaking water pipes, lights left on, equipment malfunctions, unlocked security doors etc. They also face an increased risk of confrontations or even violence at work.}} 

^{_{TWIG Tag is an active RF identifier registering attendance of security guards by swiping it with a TWIG personal safety alarm.}}