Teach you how to use a laser pointer?

Invert the focus on the upper head. After removing the cover, the top head of the laser pointer body can be rotated. By twisting the head, the laser beam lines will change and cross each other. Now find the intersection of most of the laser beam lines, which is the best place to burn. The continuous lighting time of the green laser pointer will vary depending on the output power. At the official operating temperature (25°), the portable green laser can light up within 10 seconds. If the working time is prolonged, the output power may be attenuated and increased until it does not light up.Generally speaking, AAA battery powered pen or keychain high power laser pointer are almost never considered burner lasers. Many of them are low power, around 5 megawatts, which means they are visible and useful, but not capable of lighting matches or popping balloons. Large batteries using rechargeable batteries make up almost all lasers that are classified as burning.