Crafted from durable aviation aluminum alloy, this laser flashlight is built for reliable performance in various environments. The external focus adjustment allows for easy customization of the light beam's thickness and spot size, enhancing precision and versatility. Powered by a rechargeable 18650 battery, it offers extended usage without frequent recharging. The included star cap creates starlight effects for stargazing; remove it for a focused, intense green laser spot beam with a range of up to 2,000 meters at night. The green laser beam is clearly visible even in daylight. The design includes a comfortable anti-slip grip, a pen clip, a hand strap, and a safety clip to prevent accidental activation. Item Name: Laser Flashlight Material: Metal Function: Pointer Surface Treatment: Anodized Black Battery: 18650 Rechargeable Battery Wavelength: 532nm, 405nm, 650nm Startup Time: Less Than or Equal To 0.001 Seconds Working Voltage: DC 3.7V Range: 2000 Meters Features: Green Laser Beam, High Power, Adjustable Focus Size: 15.3cm x 2.4cm (Approx.) : 1 x Laser Flashlight Option B (Green, Red, or Blue): 1 x Laser Flashlight, 1 x Battery