Tubeless design with 33mm reflex lens aperture provides a wide field of view.
Dual illuminated ( red and green);4 reticle shapes, provide various choices in different occasions, like sunshine, cloudy day.
Integral Weaver P-i-c-a-t-in-n-y Rail Base for easy mount on with a Weaver P-i-c-a-t-i-n-n-y Rail.
Parallax corrected & unlimited eye-relief; Allen head screw type windage and elevation click adjustments, with locking screw
Instruction: There are two buttons written Off on red and Off on green. When you press the Off on red button, the red light will on, so does the green light. If you want to turn off the light, you need to press the two buttons together.