Lithium CR2032 Battery, Protective Cover, Windage & Elevation Dial Tool, And Lens Cleaning Kit All Included * Glare Free, Shock Proof & Fully Coated With An Anodized Finish For Heavy Duty Recoil And Includes A Lifetime Manufacturer"s Warranty * Parallax Free & Unlimited Eye Relief Provides The Shooter A Wide Field Of View And The Ability To Operate With Both Eyes Open * Only weight 1.9oz with battery installed. Perfect For Rifles, Pistols, Shotguns, Paintball, Airsoft Or Crossbows With a 7/8" Weaver-Picatinny Rail