The Do-It-All Micro Red Dot. From handguns to shotguns and everything in between, the Defender-ST red dot is as versatile as your shooting interests. Whether this optic is part of your everyday carry setup or mounted to your shotgun sneaking around the turkey woods, the Defender-ST large ultra-clear window is the perfect size for a smooth draw out of concealment and wide enough to quickly acquire the dot on that fast-moving tom. Loaded with ShockShield technology and motion activation for instant readiness and whatever challenge you can throw at it. If you re looking for a durable and versatile red dot that fits all your shooting needs, look no further than the Defender-ST Product Includes: Glock MOS Adapter Plate Picatinny Mount Rubber Cover Lens Cloth CR2032 Battery Custom Tool Most Common Mounting Screw Sets Product Features Large Hard Coated Aspherical Lens For A Fast, Distortion-free Sight Picture and truer colors. Motion Activation With 10 Minute Auto-shutoff Automatically Activates With Motion while 10 Minute Auto-shutoff Saves Battery Life. Shockshield Polymer Insert To protect against hard, daily abuse. Deltapoint Pro Footprint Product Specifications Reticle: 3 MOA Red Dot Color: Red Battery: CR2032 Eye Relief: Unlimited Magnification: 1x Material: 7075 Aluminum Length: 1.83"