Which is best laser pointer for presentation ?

in a usb port of a computer

Adapter for the PC lights up and stows away in the battery compartment

2.4GHz Wireless Cordless Presenter with Red Laser Pointer--Remote Control Range: 15m: Amazon.co.uk: Computers & Accessories

Long Conncetion Distance 2.4GHz Wireless Presenter Laser Pointer Pen with USB Receiver Remote Page Control

The light from my laser pointer on a screen will not damage the camera a direct shine into the lens of the camera may well burn the electric of the eye out the camera may not be able to handle the intense light and it may bring out the circuits.

It is always recommended that you avoid pointing a laser pointer at eyes because they can cause eye damage. The very strong laser pointers come with some dorky looking protective glasses and they come with these glasses come with the laser because they are dangerous.

Yes you can, but these lasers a very dangerous because they run at much higher mWs (miliwatts) than the ones you would use when making a presentation in a lecture and are pretty expensive running at around $100+.

You can get it here: http://www.amazon.com/Instapark%C2%AE-Green-Laser-Pointer-Detachable/dp/B00578ZJR4

Press and hold the two buttons (small pink and clear pie shaped) for 4 seconds. the lower button will flash red once every three seconds to show laser pointer enabled. Laser pointer turns itself off after 10 minutes on non-use.