A presentation tool. It is a small hand-held laser beam mounted in a pen-sized container.
The presenter points the pen at some interesting point on the slide being shown. A small, bright, red point appears on the slide where the laser beam touches it.
The laser is harmless, but pointing it directly into someone's eye should be avoided.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Laser pointer