Feature: 1. LIGHT 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. 2. INFRARED 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. 3. EASY TO OPERATE: 850nm night view flashlight is straight barrel shape, comfortable grip, one handed control, simple and convenient operation. Infrared light emission 850nm wavelength. 4. NEED TO USE WITH: Night view flashlight needs to be used with starlight viewer goggles, infrared cameras, camera phones, monoculars, goggles, hunting animals, adventure, observation. 5. LIGHTWEIGHT AND PORTABLE: Infrared flashlight is lightweight and portable. Suitable for outdoor activities, such as photography, which could satisfy your different needs. Specification: Item Type: Infrared Flashlight Material: Aluminium Alloy Lamp: T30 Infrared Infrared Light Range: Approx. 5-10m / 16.4x32.8ft Life Span: 10000 Hours on Average Mode: Constant Light Mode Battery: 1 x 18650 Battery (Not Included) Product Size: Lamp Head Diameter: Approx. 4.5cm/1.8in Length: Approx. 14.5cm/5.7in Description: This Flashlight LED Chip, when the Light Will Turn Red, but the Beam Needs to Be Detected by Starlight Viewer or Non infrared Filters. Focusing Infrared Flashlight 850nm, Starlight Viewer Device Camera Fill Light Monitoring Light Source Fill Light, in Order to Avoid Long Time Power Consumption Due to Not Knowing Whether the Power is On, It is Recommended to Remove the Battery when Not in Use Gross Weight: Approx. 214g/7.5oz. Package List: 1 x Infrared Flashlight (Battery Not Included) Note: Please allow some error due to manual measurement.