Product Model: laser-303; Material: hard aluminum; Surface treatment: black anodized; Switch mode: touch switch; Battery: 18650 rechargeable battery; Wavelength: 405nm; Power: 200mW; Start-up time: 0.001 seconds; Working voltage: DC 3.7V with key protection; Range: 100-500 meters (visible distance at night) Product Features: 1. Constructed from aviation-grade aluminum alloy for durability and strength; 2. External focus design allows easy adjustment of beam thickness and spot size; 3. Uses 18650 rechargeable battery offering high capacity and extended operating time; 4. Front-mounted touch switch for simple one-touch operation; 5. High-quality laser diode and components enhance longevity, supporting over 10,000 hours of use; 6. Includes safety lock feature; when not in use, turn the switch to the red dot position and remove the key to disconnect power; 7. Built-in laser module with improved heat dissipation and advanced circuit board protection design for reliable performance.