Features:External focus design, easy to adjust beam thickness and spot size. With starry cap.Aluminum alloy body, lightweight and durable. Powered by provided 18650 battery (included).Suitable for presentations, teaching indicators, outdoor adventures, hiking, hunting etc.Do not aim a laser light beam towards a head and eyes and keep out of reach of children.Specification:Wavelength: 532nmBattery: 18650 rechargeable battery (included)Starting time: <0.001sMaterial: Aluminum alloyLight color: Green LightColor: BlackProduct size: 22mmx158mmPacking listPackage Included:1* Green laser pointer1* USB cable