The Weaver Classic Series Red Dot sight has easy to use digital push-button controls, a user-selectable 12hr timer, and a very long battery life with over 15000hrs. The Dot comes in an IPX7 ingress rated monolithic main housing and durable low-profile mount with a removable skeletonized high-rise spacer that allow for mounting onto many small arms. Specifications for Weaver EXCLUSIVE Weaver Classic Series 1x22 Tube Red Dot LED 3 MOA Black 7FF8A27D: Manufacturer: Weaver Brightness Settings: 10 Features of Weaver EXCLUSIVE Weaver Classic Series 1x22 Tube Red Dot LED 3 MOA Black: Efficient clear 3 MOA dot with 10 brightness settings Long lasting battery life User-selectable 12-hr timer for real-world application Mounts on handguns rifles and shotguns IPX7 durable aluminum construction with removable high-rise spacer Convenient layout and design Package Contents: Weaver EXCLUSIVE Weaver Classic Series 1x22 Tube Red Dot LED 3 MOA Black