The Mepro MPO-DS is an open reflex red dot sight designed for subcompact or slimline pistols. This cost-effective optic punches far above its cost. It features a 3.5 MOA red dot reticle, RMSc/JPoint footprint, automatic brightness control, CR2032 battery lasting 3 years plus while being water, shock, and fog proof. The Mepro MPO-DS allows you to upgrade your current sighting system with money left over for more ammo. The Meprolight name means we only produce products we, ourselves use and carry in defense of ourselves and our families. Choose the best, choose Meprolight. IPX7 waterproof. Brand: Meprolight USA Category: Red Dot Sights Model: MPO-DS Magnification: 1x Color: Black Reticle: 3.5 MOA Red Dot Material: Aluminum Firearm Type: Pistol Mount Type: RMSc / JPoint Pattern Footprint Run Time: 30,000 hrs Adjustment Size: Continuous / Friction Objective: 0.82" x 0.58" Eye Relief: Unlimited Switch Type: Shake Awake Battery Size: CR2032 Windage Adjustment: 80 MOA Length: 1.60" Proofs: Waterproof / Fog Proof Dot Size: 3.5 MOA Elevation Adjustment: 80 MOA Height: 0.90" Includes: Battery / Mounting Hardware Width: 0.90" Weight: 0.60 oz