Laser Pointer Pen buying high quality

http://www.buylaserpointer.com/other-categories/p-119.html
Offline control system which can not only work without computer, but also connect to U disk, USB communication
Can engraving materials:wood,bamboo,plastic,paper,leather,bank card,rubber
http://www.buylaserpointer.com/green-laser/p-7.html
Green Laser 10mW Product Specifications :
1.Model Number: KGL-109
2.Material: Copper
3.Surface Treatment: rubber paint
4.Operating mode : soft touch
5.Power supply:2*AAA
6.Wavelength: 532nm
7.Output power: 10mW
8.Laser range: 500-10000 meters
9.Working voltage: DC3V
10.Working temperature :0~+35Celsius degree
11.Size : 13mm*147mm
12.N.W:46g
13.Fixed focus: continuous output
http://www.buylaserpointer.com/ed/201508/cat-chasing-laser-pointer.html
Laser Pointer used to be the sole domain of business presentation makers and public speakers, but now they're ubiquitous. As many pet owners (and pet toy producers) have realized, cats love chasing tiny bright dots.
http://www.buylaserpointer.com/green-laser/p-34.html
Looking for high energy High power green laser pointers? The 5000mW high power makes this 5000mW 532nm Beam Light Green Laser Pointer Pen Kit capable of a lot of cool things.