940nm Infrared Light Wavelength: This ir flashlight emits invisible 940nm IR light, please do use the right night devices that match the 940nm ir light, without the right night vision devices you can't see the infrared light or can't obtain the efficient night vision effects. 940nm IR Flashlight for Night Activities: With the night vision devices, you can clearly find the infrared light that emitted by this infrared led flashlight, the devices such as infrared camera, night vision scope, night vision monitor, monocular¡­., they won't block the infrared light that emitted by infrared illuminator flashlight and help you have better night vision for hunting, night camera, night observation...