3.5 MOA red dot for precision and fast target acquisition; Battery life: 50,000 hours (over 5 years) of constant operation with one battery on setting 6; Battery type: CR2032 battery (battery included); Battery can be quickly changed without removing optic; Variety of mounting options sold separately; Optimized for pistol and applications which require a low-profile red dot system; Fully enclosed housing protects all electronic components of the sight from all elements; Sealed optical channel protects the optic from rain, mud, sand, or snow; 7075-T6 High-strength Aluminum Hard-anodized with Cerakoate H-Series grey coating; Submersible to 115 feet (35 meters)