S262 301 200mw 650nm Adjustable-focus Laser Red Pen (Black) ,$ 34

Product Details
General Specs     　
Model     S262
Material     aluminum-alloy
Laser Color     Red
Max. Output Power     200mw
Wavelength     650nm
Switch Location     side button
Power Supply     1*18650/16340Battery (not included)
Features
Made of high quality aluminum.
Adjustable focus.
Compact pen shaped design, convenient to carry with clip.
Can be used for presentation, teaching indicator, etc.

http://www.lazerpoint.com/red-laser-pointers/s262-301-200mw-650nm-adjustable-focus-red-laser-pointer-pen-black_0123009