About the pros and cons of using a laser pointer

With the development of laser pointers, laser pointers are often convenient for people. People use the long-distance pointing characteristics of the laser pointer. In many natural disasters, their light is used as a guide and help signal. In a dim environment, you can clearly see the lines of this beam, which has become an important guiding tool. Not only that, it began to gradually integrate into people's presentations, combined with our computers, produced a new type of laser pointer page presentation Green laser pointer. Its creation helps presenters, especially teachers' presentations. When I was in school, I often saw teachers dancing with a pen-like tool in their hands. When the teacher presses the corresponding function key on the laser pointer, the classroom ppt can be rotated and used. As an important display tool, it can help the listener clearly understand the current location.