The all-new Viridian RFX45 Red Dot Sight is packed with industry-leading features while offering a tremendous value to the shooter. A rock-solid machined 6061 aluminum housing, fully multi coated lenses, audible and tactile adjustability, INSTANT-ON activation with memory and auto shut off, and a 50k hour battery life are just a few of the features that make the RFX 45 a must-have for any shooter.Viridian invented green laser pistol sights almost two decades ago ushering in a new era of visibility and inspiring change across the industry. In 2021, Viridian continued to lead the market by launching the RFX line of reflex sights, exclusively with highly visible green LED's. The RFX 45 Closed Emitter Green Dot Sight is the latest addition to the RFX line of electro optics. FeaturesUp to 50,000 Hour Battery LifeFully Multi-Coated Glass10 Brightness Settings (8 Day/2 Night)Auto Shut OffMount IncludedWindow Size: 24mm x 15.5mm