presenter use laser pointer
http://www.kitlaser.com/the-dual-function-nanorod-LED-is-written-by-a-laser-pen.html
However, there is a pen of green laser like the tiger. These units are often imported to the United States without the proper label of certification or manufacturer. This type of (imported from Russia) pointer launches from a neodymium green beam: YAG diode pump frequency at 532nm.
