Features 1.Made of aviation grade metal. 2.Prevents laser light from accidentally hurting people and keeps children from playing with it without supervision with safe lock design at the bottom. 3.To lock off the laser pointer, key hole should align with the dot. 4.To use 18650 battery, 5.By rotating the focus ring to adjust beam light. Find the smallest spot of the beam light to light a matchstick. Specification Material: Aviation grade metal Dimensions: 5 x 1 inches Weight: 4oz Power supply: 1 x 18650 battery Laser range: 1.2-5 miles/2km-8km Output wavelength: 405nm Output power: 5mW Output wave: Continuous wave Working voltage: DC=3.0-3.7V Start-up time: < 3 seconds Working temperature: +15°C~35°C Storage temperature: -10°C~+40°C How to use? 1.Unable to light a matchstick because the beam is parallel light. 2.Adjust the focus to enlarge the spot size. 3.Find the Focus Point(the smallest spot size on the beam ), most powerful and capable of lighting a match. Note Keep out of the reach of children. DO NOT point directly at human or animals eyes. Package includes 1 x Laser pointer 1 x rechargeable 18650 battery(random send color) 1 x charger Shipping 1. We ship your orders within 1-2 business days after the payment cleared. 2. with the tracking number, most reach USA about 2-8 working days. 3. Delivery time depends on destination and other factors, it may takes up to 20 days. If you don't receive the item after 25 days,please contact us, we'll investigate and solve the delivery problem.