Laser and laser pen is widely used in many different applications in the field of wide range of professional and personal. From different output power and beam of blue laser light color, and life safety and design features to the attachment, before buying any particular laser can be filtered has quite a lot of information. Here, we will introduce before the purchase should pay attention to the laser application and some basic aspects. Although there are a lot of people think that the color of the laser beam has no effect on the possibility of burning ability. The power output of Milliwatts has totally determined the burning power of any laser. Typically, the 200mW is supposed to be the smallest power in a burning laser pen, and, of course, the higher the power, the greater the potential.