Osight S Reflex Red Dot Sight 1x 21x14mm 2 MOA Dot and 32 MOA Circle with Magnetic USB-C Rechargeable Charging Cover Black. Their offerings include EDC flashlights outdoor lights tactical lights WMLs ambient lights headlamps bike lights Optics and accessories. For years Osight has been striving to deliver cutting-edge illumination tools to help you do your best in your daily work and hobbies indoors and out. Creating quality products to help you conquer the night is the root of their business. Additionally they endeavor to make every light they build a unique companion to accompany you through your brightest and darkest moments and always be by your side. Specifications for Osight S 1x21mm Reflex Red Dot Sight: Manufacturer: Osight Magnification: 1 x Objective Lens Diameter: 14 - 21 mm Objective Window Size: 21x14 mm Reticle: 2 MOA Red Dot 32 MOA Circle Illumination Type: LED Illumination Color: Red Brightness Settings: 12 Eye Relief: Unlimited Adjustment Click Value: 1 MOA Emitter Type: Enclosed Parallax: Parallax Free Battery Type: Rechargeable Lithium-Ion Battery Battery Life: 87600 Operating Temperature: 0 - 45 Celsius Water Resistance Level: IPX-7 Water Resistant Mark: 1 m Length: 1.59 in Width: 0.98 in Height: 0.97 in Weight: 0.97 oz Red Dot Sights-Footprint: RMSc Features of Osight S 1x21mm Reflex Red Dot Sight: Multi-Reticle System Package Contents: Osight S 1x21mm Reflex Red Dot Sight Osight 6978095650087: S Reflex Red Dot Sight 1x 21x14mm 2 MOA Dot and 32 MOA Circle with Magnetic USB-C Rechargeable Charging Cover Black