Lens material: PMMA.White light parameter: 6000K.Light color: white, yellow, blue, green, red.Working gear: 5th gear (strong, medium, weak, burst flash, slow flash, light off) Long press for 2 seconds to directly turn off the light.Product size: 14.8*3.7*2.7cm.Applicable battery: 18650.Waterproof class: IPX6.Product power: 10W.Product material: Aluminum alloy.Operating voltage: 3.7V.Product color: Black.Charging mode: micro USB direct charge.Adjust the focal length: The focal length is fixed.Switch position: push button switch in the middle (the electric quantity of switch charging is displayed, the green light indicates electric quantity, and the red light indicates low electric quantity).Set List: 380g (flashlight, rope, charging cable, 18650 battery, Picatini stand, pressure switch, 5 colors of lens, Velcro, wrench, user manual, plastic packaging box).Features:1.L2 lamp bead, high brightness up to 1600 lumens, service life of 100,000 hours;2. Lens: Good light transmission performance, not easy to damage, strong aluminum attack head to protect the lens from wear;3. Fixed focus: good concentrating effect, long irradiation distance;4. Middle switch: high quality natural rubber material, surface anti-slip treatment, touch the switch to switch lighting mode, long press the switch to turn off the light;5. Battery contact: spring type battery contact design, copper has good conductivity, effectively prevent bad contact phenomenon.Characteristics of white light: The use of white light in the dark is in line with our eyes' visual experience, so the eyes do not need to spend time to adapt, is comfortable for the eyes. And white light is higher than other colors in brightness and color temperature, giving people a strong sense of brightness.Yellow light: Dealing with water vapor and mist, yellow light is the least refracted and scattered color light in all visible light. In other words, yellow light is very penetrating and travels farther than other visible light under the same conditions.Red light features: To improve hunting efficiency, the human retina contains two kinds of sensitive tissue, color discernable pyramidal cells, distinguish outline of the rod cells. Many animals have only rod cells or few pyramidal cells, resulting in little or no color sensitivity. Hunting at night can be unscrupulous with the red light to sweep the prey undetected, greatly improving the efficiency of hunting. Red light is still a very useful color for outdoor activities. The eye is adaptable - when the lighting color changes, the eye needs a process of adjustment to adapt. There are two kinds of adaptation: dark adaptation and light adaptation. Dark adaptation is the adaptation process from light to dark, which takes a long time. Light adaptation is a process from dark to light that takes a short time. When we use white light to illuminate outdoor activities, the line of sight from the light to the dark, belongs to dark adaptation, takes a long time, will appear temporary "blindness", while red light in the dark adaptation needs a shorter time, very good to avoid the problem of temporary "blindness", let us better treat our eyes and maintain better night vision.Blue light features: Trace the blood of injured prey. Most white leds are actually produced by shining blue light on phosphor, so LED white light contains more blue components. Because blue light through the air refraction, high scattering rate, usually travel a short distance, that is, penetration is poor. But the blood of animals fluoresces faintly under blue light. Hunting enthusiasts in Europe and the United States also use blue light torches to track the blood of wounded prey, so that they can eventually capture the prey.Green light characteristics: green light is a lot of animals are not sensitive to the color, but the human eye is very sensitive, under the same brightness, green light and blue, red, white light compared with the human eye will feel green light is the brightest.In a leafy outdoor setting, other colors are more likely to be absorbed by the green leaves, and green light is more likely to penetrate the jungle. In certain situations, green light is more likely to hunt dark prey, such as wild boars, especially when it is obscured by dense vegetation, and for some experienced hunters, green light is less likely to startle the boars.