Stepless Dimming Red Light Flashlight, 620nm-630nm High Purity Red Light Flashlight, Adjustable Brightness and Focus Red Flashlight for Night Observation, Astronomy, Aviation

This is a red light flashlight, the brightness of the red light is adjustable: when rotate the tail button of the flashlight, the brightness can be steplessly dimmed to be suitable for your application. Press this button to turn on/turn off the flashlight.
The wavelength of the Red LED Light is 620nm-630nm, the Red LED emits True High Purity Red Light. At 100% brightness it's a high power flashlight, but its brightness can be slowly dimmed lower for different applications, the lowest brightness is 5%. Choose low-lumen red light to prevent your eyes from losing sensitivity to dim light in the darkness.
Human's eyes are sensitive to the red range of light, but animals are not spooked by red light, so, the red light flashlight is a very useful tool for night hunting and night observation. If you use the flashlight with white light, animals will hide from you, it's hard for you to watch their natural behavior at night.
Red light flashlight is also a very useful tool for Astronomy and Aviation: on reading charts, checklists, or other documents. With this night version red aviation light, aviators, astronomers who want to retain their night vision would benefit from this red LED flashlight.
This red flashlight use Three AAA batteries with battery holder or One rechargeable battery(Battery Size: Length of 65mm/2.55inch and Diameter of 18mm/0.71inch) NOTE: Battery is NOT included in the package.

Hello,