Features<br />* To use 18650 battery. <br />* Made of aviation grade metal.<br />* To lock off the laser pointer， key hole should align with the dot.<br />* By rotating the focus ring to adjust beam light. Find the smallest spot of the beam light to light a matchstick.<br />* Prevents laser light from accidentally hurting people and keeps children from playing with it without supervision with safe lock design at the bottom.<br /><br />Specification<br />- Material: Aviation grade metal<br />- Start-up time: < 3 seconds<br />- Output power: 5mW<br />- Output wavelength: 405nm<br />- Output wave: Continuous wave<br />- Working voltage: DC=3.0-3.7V<br />- Power supply: 1 x 18650 battery<br />- Storage temperature: -10°C~+40°C<br />- Working temperature: +15°C~35°C<br />- Laser range: 1.2-5 miles/2km-8km<br />- Dimensions: 5 x 1 inches<br />- Weight: 4oz<br /><br />How to use?<br />▶ Unable to light a matchstick because the beam is parallel light.<br />▶ Adjust the focus to enlarge the spot size.<br />▶ Find the Focus Point(the smallest spot size on the beam )， most powerful and capable of lighting a match.<br /><br />Note: <br />Please choose as you like. <br />Keep out of the reach of children.<br />DO NOT point directly at human or animals eyes.<br />Thank you for understanding. <br /><br />About SIZE (EU/US charger + Battery + Pen)<br />Package includes<br />1 x Laser pointer<br />1 x Rechargeable 18650 battery (random color)<br />1 x Charger