1LIGHT SOURCE: Infrared flashlight in the light pink light source under the cell phone camera detection, can detect whether the infrared flashlight is working properly or difference 850 band. 2INFRARED FLASHLIGHT: IR flashlight is not a white LED flashlight for general lighting, emitting infrared light. You won't see any light with your bare eyes. Only a faint red light on the LED indicates that the flashlight is on. 3EASY TO OPERATE: 850nm night view flashlight is straight barrel shape, comfortable grip, one handed control, simple and convenient operation. Infrared light emission 850nm wavelength. 4NEED TO USE WITH: Night view flashlight needs to be used with starlight viewer goggles, infrared cameras, camera phones, monoculars, goggles, hunting animals, adventure, observation. 5LIGHTWEIGHT AND PORTABLE: Infrared flashlight is lightweight and portable. Suitable for outdoor activities, such as photography, which could satisfy your different needs.