The Olight Osight S is a versatile dot sight featuring a clear, easy-to-see red 2 MOA dot and a 32 MOA circle, which can be used individually or together for rapid and precise aiming. It comes with 12 different brightness settingstwo for night vision and the rest for daytime use. Its aspherical lens ensures zero distortion and parallax-free performance, delivering exceptional clarity through the large window for rapid and precise usage. The optic can be easily zeroed with both windage and elevation adjustments, ensuring your aim is always accurate. The Osight S is easy to use by offering two operating modes: Auto-Sensing mode and Manual mode. In Auto-sensing mode, the Osight S adjusts brightness automatically based on ambient light conditions while in the manual mode, you can select from the 12 brightness modes for more precise control. The Auto Wake motion sensor activates the sight with any movement and powers it off after 10 minutes of inactivity (this feature can be disabled if needed). A built-in battery indicator keeps you informed about the remaining battery life, so youre never caught off guard.The Osight S boasts the industrys first magnetic charging cover. The cover magnetically charges the optic and features an LED battery percentage display on top, so you are always informed about the battery life. A single charge powers the sight for up to 21,900 hours in dot-only mode at the lowest brightness. Additionally, the magnetic cover can recharge the optic up to three times, and its USB-C port allows for a full recharge in just 1.5 hours. Compact and lightweight, the Osight S measures 1.67 inches in total length with the cover on and weighs 2.13 ounces with the cover. Its IPX7 waterproof rating and durable OAL housing ensure reliability and toughness in any environment. Specifications for Olight Osight S 1x14-21mm Reflex Red Dot Sight: Manufacturer: Olight Color: Black Magnification: 1 x Objective Lens Diameter: 14 - 21 mm Objective Window Size: 0.83 x 0.55 mm Reticle: 2 MOA Red Dot 32 MOA Circle Illumination Type: LED Illumination Color: Red Eye Relief: Unlimited Adjustment Click Value: 1 MOA Battery Type: Rechargeable Lithium-Ion Battery Battery Life: 87,600 Length: 1.59 in Width: 0.98 in Height: 0.97 in Weight: 0.97 oz Red Dot Sights-Footprint: RMSc Features of Olight Osight S 1x14-21mm Reflex Red Dot Sight Features a red 2 MOA dot and a 32 MOA circle Features 12 brightness settings: 2 for night vision, 10 for daytime use Choose between Auto-Sensing and Manual mode to choose brightness settings Activate the motion sensor function to turn on the optic with any movement Features a USB-C rechargeable magnetic charging cover Package Contents: Olight Osight S 1x14-21mm Reflex Red Dot Sight Optic Charging Cover Adjustment Tool Silicone Lanyard USB-C Charging Cable Pouch Cleaning Cloth Screw Box M310.5mm Screw x 3 M311.5 mm Screw 3 M49.4 mm Screw 3 M410.5 mm Screw 3 #6-320.433 in Screw 3 #6-400.374 in Screw 3 #6-400.449 in Screw 3