5mW 650nm Open-back Red Laser Pointer Pen(2 x AAA) ,$ 4

■This red laser pointer pen is 100% brand new
■The red laser pointer pen is great for pointing objects from long distance, such as stars
■Red laser pointer pen is visible in dark area
■The 5mW laser pointer pen is power saving, compact and reliable
■Max Output: 5mW
■Wave Length: 650nm 
■Power: 2 x AAA batteries (not included)
■Size: 1.0 x 13.5cm/0.39 x 5.31in (Dia. x L)

• The nice red laser pointer pen is great for pointing objects from long distance, such as stars

http://www.dinodirect.com/30mW-650nm-Ultra-Powerful-Red-Laser-Pointer-Light-Pen.html