Ratchet 1x23x34 Multi Green / Red Reticle Reflex Sight with Quick Release Rail Mount Light and Compact, Quick Release 21mm Weaver Style Mount Base, Four Reticles, great for rifles and pistols, Tactical Style Included with SCRD-23 Reflex Sight 1 - SCRD-23 Reflex Sight 3 - AG5 Button Cell Batteries 1 - Quick release mount for 21mm Rail 1 - SCRD-23 Battery 1 - Allen wrench for adjusting windage and elevation On/Off button located on left side of reflex sight which are also used to change the reticle color and brightness. Comes with battery and quick release mount installed so the reflex site is ready to be mounted on your gun as soon as you take it out of the package.