UniqueFire UF-T20 IR 940NM 38mm Infrared Light Night Vision Flashlight Torch Set with Dual Control Remote Pressure Switch + Scope Mount LONG RANGE ILLUMINATION: Utilizing high power IR black 940nm LED emitter- the smallest infrared LEDs with more than one watt of optical power. Rotary focusing system: illuminate much farther with smaller light spot. CAUTIONS: Infrared light is invisible to human eyes. It is designed to be used with night vision device.(Only a small and faint red glow on the LED to show you that the torch is on). ASPHERICAL LENS: 38MM Lens rotary focusing torch suitable for hunters. The perfect torch for hunters.Zoomable night vision torch,as well as the ability to focus in for a tight spotlight or back out for a flood effect. SOLID RELIABILITY & MODE MEMORY: Body made of aircraft aluminum alloy.Weight:174g.Length:142+7mm/Head: 44mm/Tail: 25mm. 3 mode system from Low-Mid-High with Mode Memory (This Flashlight Remembers and Turns on to the Last Setting that it is Operated on). BE AWARE that not all infrared cameras & night vision scopes will pick up 940nm IR light. This is because 940nm is much further away from the visible light spectrum than 850nm making it harder for a camera sensor to pick up. Check that the camera equipment you are using is compatible before you buy.