To buy a 20mw laser pointer, please see here from Wallis Lucy's blog

If you want to buy a 2000mw laser, pay attention here. Generally speaking, there are low-power and high-power laser pointers. According to people's needs, various laser pointers have appeared one after another. Considering safety and practicality, low-power laser pointers are more practical in daily life. For example, the 20mw laser pointer I want to introduce is like this. It looks like a pen and makes you feel close.

The risks of different types of lasers

Laser classification is divided into different power sectors, ranging from class 1 (lowest power) to class 4 (highest power). Laser classification is directly related to the beam output that the long range laser pointer can produce. Let's take a look at each category. Class I laser: For very low-power visible light, the beam emission power is less than 0.39 mW. Due to direct or reflected illumination, these beams are not dangerous to the human eye. There is no risk of skin burns and no risk of material burns.

There is no detailed function, but the basic part is the same as the Japanese standard products purchased by PSC and sold in Japan, and the price is about 20,000 to 30,000 yen. First of all, just because it is the PSC standard does not mean it is high-quality, and the PSC examination standards do not require high-quality examination items. There are some problems with performance stability, but just because it is a PSC standard product does not justify its high price.