300mW 650nm Flashlight Style Ts-0019 Type Laser Red Pen with 18650 Battery ,$96

* Made of high quality material, so it is enough durable for long time using
* The red laser can be seem as far as the eye can see
* Power saving, compact and reliable
* Simply press the button to activate the red laser pointer and release it to deactivate
* Lightweight and handy design, it is very convenient to put in bags or pockets
* Perfect for teachers, professors, doctors, managers, engineers and so on

Technical specifications
Key features     Red laser beam
Laser color     Red
Laser wavelength     650nm
Laser output power     300mW
Light type     Beam light
Power supply     1 x 18650 2200mAh 3.7V battery
Switch     Button
Operating voltage     3V - 4.2V
Working mode     Continuous light
Laser range     500 - 5000meters
Working temperature     0℃ - 40℃
Storage temperature     0℃ - 40℃
Body material     Aluminum
Dimension     18.9 ( L ) x 2.2 ( D )cm / 7.44 ( L ) x 0.87 ( D )inch
Weight     10.44oz

http://www.laserpointerpro.com/300mw-650nm-flashlight-style-ts0019-type-red-laser-pointer-pen-with-18650-battery-p-492.html