Model: Laser-303;Material: Hard aluminium;Surface treatment: Black anodised;Switch mode: Touch switch;Battery: 18650 rechargeable battery;Wavelength: 405 nm;Power: 200 mW;Start-up time: 0.001 seconds;Operating voltage: DC 3.7 V with key protection;Range: 100-500 metres (the greatest distance visible to the naked eye at night) Product advantages1. Made of aerospace aluminium alloy, solid and durable;2. External focus, easy to adjust the thickness of the light beam and the size of the light spot;3. 18650 rechargeable battery, large capacity, long battery life;4. Front switch, press to turn on, release to turn off for easy operation;5. Import LD and accessories to increase service life, more than 10,000 hours;6. With a child safety lock, when not in use, turn the switch key to the red dot and pull it out to disconnect the power supply;7. The built-in laser module improves heat dissipation and the protective design for the accumulation of printed circuit boards (the current excellent improvement of laser printed circuit board defects);