by Olena on July 11,2018
Actually,I have owned six laser pens of this kind.But they're all green/blue lasers,so I bought red light laser this time.Of course,it's as bright as green/blue light.There's been no problem up to now.
by Jessica on June 10,2018
This kind of pen-type laser pointers is exactly what I like.Light-weight,carry it wherever you go.I have used it many times in my lecture class,it helps a lot.
by Adden on April 16,2018
No matter in any corner of the classroom, in the lecture hall, or in the back of the conference room with the listener, the screen will automatically appear on the screen, and the computer is no longer necessary.