Powerful Green Laser, Long Range • Color and Beam Type: A visible, concentrated green laser beam that is clearly visible in darkness and even in low-light conditions. • Actual Range: The beam range reaches over 5 kilometers (5KM+) in clear, dark weather conditions. • Battery and Power Source: Powered by a rechargeable 18650 lithium-ion battery (3.7V), charged by the included external charger. • Material: The outer casing is made of military-grade aluminum alloy, resistant to shocks and scratches, with a rough texture to prevent slipping during handling. 🌟 Key Functional Features • Visual Effect Heads (Pattern Lenses): Comes with rotatable metal heads; when attached, the beam disperses, transforming from a "single dot" to a "star field" or dynamic geometric shapes, excellent for parties and camping. When the head is removed, it reverts to a traditional straight beam. • Bottom Safety Switch (Lock Protection): Features a mechanical lock at the rear to prevent accidental activation by children. (Green indicates the device is ready to operate, red indicates it is locked). • Adjustable Focus: You can rotate the front head to zoom in or out of the focus, helping to make the beam sharper or wider. 🎒 Common Uses • Trips and Camping (Astronomy): Pointing out stars and celestial bodies, indicating distant paths, or using it as an emergency distress signal. • Contractors and Engineers: Indicating residential towers, buildings under construction, or high places that are difficult to access. • Presentations: Explaining in very large halls and university lecture halls.