Emitter Type: High Power Infrared LED Light Wavelength: 940nm Mode: One Mode/Single Mode(On/Off Switch) Input Voltage: 3.7V-4.5V Battery Configuration: Vastfire Rechargeable battery(Battery Size: Length of 65mm/2.55inch and Diameter of 18mm/0.71inch) (Battery included) Body Material: Aluminum Alloy Size(Length*Body Diameter): 5.67"*1.50"/14.4CM*3.8CM Weight: 125g/4.41OZ Package include: 1 X Vastfire 940nm IR flashlight 1 X Pressure Switch 1 X Vastfire Battery 1 X Battery Charger 1 X Mount bracket 940nm Infrared Light Wavelength: This IR flashlight emits invisible but high power 940 IR light, without night vision devices you can't see the infrared light, when the infrared flashlight is turning on, by your naked eyes you can look at the led bulb of infrared illuminator flashlight, you can only see a dim faint red glow on it, shows that the IR illuminator flashlight is working. Night Vision Flashlight for Night Activities: With the night vision devices, you can clearly find the infrared light that emitted by this 940nm flashlight, the devices such as infrared camera, night vision scope, night vision monitor, monocular, goggles, infrared monitoring, they won't block the infrared light that emitted by led infrared flashlight and help you have better night vision for hunting, night camera, night observation and so on. Single Mode One Mode IR Light Flashlight: 1 switch mode(On/OFF), press the tail button of the IR led flashlight to switch the flashlight On and Off, when the led bulb is showing red, it means that the 940nm IR illuminator is turning on. Adjustable Light Focus: You just slide the head of the IR flashlight back and forth for zooming light in and out, through the glass lens of the flashlight, the zoomable led infrared light can be focused from a wide flood to a spot beam, it means you can shot the IR light to the further, but it also depends on you night vision devices.