What's in the Box Holosun 20mm Micro Optical 2 MOA Red Dot Sight Quick Release & Detachable Mount User Manual Lens Cloth T10L Key CR2032 Battery The HS515GM is a 20mm micro optical sight designed for rifle and carbine applications. Features include 7075 Aluminum Housing, Shake Awake, 12 brightness settings, Holosun s Green Super LED with up to 50k hours battery life, Multi-Reticle System, QD mount, Kill flash, and Clear Lens Caps. Product Features MRS:2 MOA Dot; 2 MOA Dot & 65 MOA Circle Up to 50,000 Hours Battery Life (Setting 6) 12 Brightness Setting: 10 DL & 2 NV Compatible Parallax-Free & Unlimited Eye Relief Quick Release & Detachable Mount Product Specifications Light Wavelength: 650nm Reticle Color: Red Power Source: Battery Battery Type: CR032 Battery Life: 50,000 Hours Surface Finish: Hard Anodize