Regarding this subject. Thought it important to inform everyone that might get and use one. Be careful to not allow the beam to shine into a person's eye. Even the low intensity of these types can do damage. Here at the big bomber plant some people use them frequently in slide/chart presentations (a daily ritual) at meetings. We couldn't exist without "bubble charts", manpower forecasts, cost and schedules, and "wiring diagrams" (a wiring diagram shows how the company is hooked together, i.e. an organizational chart). The company has put out several safety tips on this subject. It has especially been a problem with young children playing with them, so keep them away from the kids and grandkids.