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Hi, guys! Did you write a thesis in university? Do you still think it is a tough task? Unfortunately, I have a thesis to finish before Christmas. It is about laser beam or laser technology. When I started to prepare the material, I searched some information about Blue Beam Laser, green laser beam, and red Beam Laser Pointer; besides, in order to compare the difference various laser pens, I also spent a lot of time studying the usages of 20mw green laser pointer pen, the useful 50mw green laser pointer pen, and the most widely used 30mW Green Laser pen. However, as I haven’t used any of them b4, it is a little bit difficult for me to write the user experience although I read some customer reviews of laser for sale in some large electronic products wholesale shop. So if some of you who have ever used any laser pen b4 could give me some help, I will be much appreciated!