102706 - Material: Aluminum alloy - Aperture: 33mm - Dot color: Green/red selectable - 4 reticle modes changeable - 5-grade adjustable brightness - Light weight， waterproof and shockproof - Powered by 1 x CR2032 battery (included) - Rail: 21mm - Comes with hexagon wrench and English user manual - Great for gun accessory lovers