NO BATTERY! NO BATTERY! NO BATTERY! 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.By rotating the focus ring to adjust beam light. Find the smallest spot of the beam light to light a matchstick. Specifications: 1.Material: Aviation grade metal 2.Dimensions: 5 x 1 inches 3.Weight: 4oz 4.Power supply: 1x 18650 battery 5.Laser range: 1.2-5 miles/2km-8k 6.Output wave: Continuous wave 7.Working voltage: DC=3.0-3.7V 8.Start-up time: < 3 second Package includes: 1 x Laser pointer (not included the battery) Note: The real color is a little different from the picture is allowed.