Interactive Sensor System Gaialoop's IS System allows your new red dot sight to stand by and feel you anytime, which presents automatically power off in 5-minute motionlessness but immediately wake up hen it senses any slight shake. Adjustable 6 Level Brightness Control 6 level red dot brightness settings provide optimal visibility in any light conditions. let shooters cater the dot intensity to the situation at hand. Waterproof & Fog proof & Shockproof Multi-coated lens, waterproof & fog proof, works great in all weather conditions. Solid metal construction, durable and shockproof. Specification Housing Material: Anodized Aluminum Alloy Power Source: 1 CR2032 Battery Battery Life: Up to 1 Year W&E Adjustment: 1 Click = 1 MOA Windage Adjustment Range: ±60 MOA Elevation Adjustment Range: ±50 MOA Object Lens Size: 20mm Object Lens Type: Red Multi-coatings What's in the box? 1 x Gaialoop Mini Red Dot Sight1 x Gift Box1 x Riser Mount4 x Screws2 x CR2032 Batteries3 x Allen Wrenches1 x Instruction1 x Slotted Screwdriver Specification Reticle Size: 3.25MOAReticle Type: Red DotIllumination Wavelength: 650nmParallax: Free@50yds 20 red dot sight 30 red dot sight Mini Red Dot Sight See Details See Details See Details Customer Reviews 4.3 out of 5 stars 149 4.0 out of 5 stars 48 — Reticle Type Red Dot Red Dot Red Dot Reticle Size 2 MOA 2 MOA 2 MOA Object Lens Size 20mm 30mm 24mm Parallax Free@50yds Free@50yds Free@50yds