CVLIFE Red Green Dot Sight, 4 Adjustable Reticle Reflex Sight, 9 Brightness Setting Holographic Sight for 20mm Rail Mount

[Red and Green Illumination] Red dot sight with dual illuminated (red and green), featuring 4 different reticle patterns, providing various options for different occasions, such as sunny days and cloudy weather. [9 Brightness Control] Reflex sight offers 9 brightness levels with red and green illumination. From bright daylight to low-light conditions, effortlessly adjust the brightness for clear and precise targeting. [Wide Field of View] Holographic sight in Tubeless design with 33mm reflex lens aperture provides a wide field of view. [Unlimited Parallax] Benefit from unlimited eye relief, ensuring comfort during extended use. Easily fine-tune windage and elevation with the Allen head screw, and lock your settings securely in place with the locking screw. [Instruction] There are two buttons written in red and green. When you press the red button, the red light will on, and so does the green light. If you want to turn off the light, you need to press the two buttons together.