CVLIFE Red Dot Sight ON & Off Switch for 20mm

Description: Dual illuminated ( red and green) reflex sight with 4 reticle shapes provide various choices in different occasions like sunshine cloudy day. Red green dot sight designed with integral P-i-c-a-t-in-n-y Rail Base for easy mount on with a P-i-c-a-t-i-n-n-y Rail. Parallax corrected & unlimited eye-relief; Red dot with Allen head screw for windage and elevation click adjustments with locking screw. Instruction: There are two buttons written “on red” and “on green”. When you press the “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.