Blue laser, long range Color and Wavelength: A cutting blue laser beam with a wavelength between 450nm and 455nm. Power and Capability: This series is available with high power (commercially classified in stores like AliExpress with power up to 5W / 5000mW), which is sufficient energy to burn light materials such as paper or dark plastic when the beam is focused. Lens and Focus: The laser includes an adjustable and manually focusable lens (Adjustable Focus) to control the diameter of the laser dot and its dispersion. Beam Range: The visibility range of the blue beam in the dark reaches vast distances between 10,000 to 15,000 meters. [1] ( [2] ( [3] ( [4] ( Design and Dimensions Material: The entire outer casing is made of shock-resistant aluminum alloy processed in various colors (brown, gray, purple, black). Dimensions: Length is approximately 12 cm, and diameter is 2.4 cm. Lightweight: The laser weighs about 110 grams (without battery). Power Switch: A rear metal tail-switch button is pressed for continuous on and off operation. [1] ( [2] ( [3] ( [4] ( Power and Battery Battery Type: Powered by a rechargeable 18650 size 3.7V lithium-ion battery (the battery and charger are usually sold separately or with accessories). [1] ( [2] ( [3] ( Very Important Safety Warning: Due to the high power of this laser (450nm blue), it is strictly forbidden to point it at the eyes or skin. Wearing goggles is also strongly recommended.