Information! Curious with Infrared Laser Pointer

[chloeelvis]

I have learned that infrared laser pointer is usually adapted in the surveillance industry as well as the foreign and domestic intelligence agencies. In additions, it has now begun to be used in modern time military field.
I am a bit puzzled with this kind of laser. Is it necessary to wear laser safety goggles?
The beam is not visible, while how do I know its powerful? I am really very curious with this kind of laser. What color laser glasses I need to wear?
I am interested in this kind of invisible beam laser. I need some suggestion. How can it applicable in daily life?