Red 3 MOA Dot For the Doctor/Docter/Venom Footprints Shake Awake/Motion Deactivated Standby Up to 50,000 Hours of battery life IPX7 waterproof Top Mounted Battery Window Size - 24x17mm or 0.94"x0.67" Parallax Free 8 Daytime Settings/2 Night vision Settings The CALF Series proves that entry-level optics don’t have to be poor quality optics. Unlike other brands, we don’t use the word “value” as a euphemism for “junk”. Classic Series Pistol red dots are perfect for the budget conscious. We take the time to inspect every product we send out to ensure you are receiving the best quality The optic is optimized for full size carry pistols or competition guns as it features a wide 24x17mm lens allowing for a quick and easy sight picture. It features MDS Mode(Motion Deactivated Standby)，the Red Dot will activate when movement force is recognized, and the red dot will turn off automatically when left still for 5 minutes. If, you are looking for a new red dot for carry, competition, or even your rifle, you can't go wrong with the CALF V2. Window - 24x17mm or 0.94"x0.67"