1000mW 447nm Waterproof Adjust Focus Blue Laser Pointer Pen ,$162

Features:

This blue laser pointer pen is well tested and high quality
Easily to use, only need to push the back button then you can see striking blue beam of light shoot forth
The blue laser pointer pen can point at any targets, such as photos, blackboard, video monitors and so on
This blue laser pointer pen is the best choice for teachers, professors, doctors and so on
Cheap laser pointer is clearly visible in the dark
The high power laser pointer is designed in pen shape
This 1000MW blue laser pointer is small and light to carry

http://www.dinodirect.com/blue-laser-pointer-pen-focus-waterproof-1000mw-1w-447nm.html