"The Athlon Optics Talos EDC Red Dot Sight is specifically designed for today's subcompact carry firearms. A low-profile composite housing is built duty-tough. With 50,000 hours of battery life on medium setting, the Talos from Athlon Optics is always ready. Thanks to its fully multi-coated optics, this site effectively reduces reflected light and increases the transmission of light giving you a brighter image than normal single coated lenses. Like any great site, the Talos is nitrogen purged, waterproof, fog proof, and shockproof. Its compact footprint is ideally suited for the Sig Sauer P365, Springfield Hellcat, Glock 43 MOS, and many others using the RMSc footprint standard. Runs on a CR2032 battery. 1X magnification. 3 MOA dot size. Length: 1.61"". Center height: 0.96"". Weight: 0.36 oz. Objective lens: 22 x 16mm. Designed for today's subcompact carry firearms 50,000 hours of battery life on medium setting Fully multi-coated for bright imagery Waterproof, fog proof, and shockproof"