High-Power Laser Green laser with 532nm wavelength,visible up to 5000 meters at night Durable Construction Made from aviation-grade aluminum alloy for long-lasting durability Child Safety Lock Features a removable key switch for added safety when not in use Adjustable Focus External focus adjustment allows for easy beam width and spot size control Long Battery Life Powered by a high-capacity 18650 rechargeable battery for extended use Quick Activation Front-mounted switch enables instant on/off functionality for convenient operation Extended Lifespan Imported LD and components ensure over 10,000 hours of operational life Specifications: Model: Laser-303 Material: Hard aluminum Surface Treatment: Anodized black Switch Type: Touch-sensitive Battery: 18650 rechargeable,1000mAh Wavelength: 532nm (green) Activation Time: 0.001 seconds Operating Voltage: DC 3.7V with key protection Range: 5000 meters (visible to naked eye at night) Dimensions: 23mm x 168mm Package included: 1 x Laser Pointer 1 x Battery 1 x Charger