CVLIFE Mini Max Dual-brightness Reflex Red Dot Sight Finished with 20mm Weaver Rail Mount Color: Black; Material: High quality Aircraft Aluminum Alloy Constructed with the tubeless-design reflex lens aperture, the reflex sight provides a wide field of view. With the switch for off/low brightness/high brightness, you can adjust the brightness of the red dot easily. Coming with the tools to adjust the windage and elevation, this lightweight and compact red dot sight is ideal for handguns. With a "QD" quick-detach thumbnut, the dot sight can be installed quickly and easily.