Power: 100w Rotation: can rotate 360 degrees Range: 3000 meters Advantages: straight barrel, beautiful appearance, external focusing, easy to adjust the thickness of the light column, the size of the light spot (the focusing is very convenient), can use 18650 batteries (screw on the extension tube) or 16340 batteries, large capacity, easy to buy, duration Battery installation: ① Unscrew the back cover of the laser pointer. ②Take out the battery and prepare to place it. ③Place a 18650 or 16340 battery with the negative pole facing inward, align it with the spring inside, and then screw the back cover. (Note: The extension tube needs to be twisted off when using 123A battery; the extension tube needs to be twisted when using 18650 battery) This product does not include battery! ! ! ④Use the key to open the rear switch lock, the green dot is on, and the red dot is off. [Pure copper gypsophila head] The copper core is inlaid with the optical lens part, which is made of pure copper