Ultradot 1 (25mm) - Tube Diameter: 1 / 25mm - Field of View: Unlimited - Windage/Elevation Adjustments: 1 MOA per click - Dot Size: 4 MOA - Dot Brightness Adjustment: 11 Settings / Click - Length: 5.1 Inches - Battery: 3v Lithium CR2032 - Battery Life: 20 - 4000 Hours - Weight: 3.9 oz - Parallax Free @ 50m - The UltraDot is the most compact lightweight and streamlined sight on the market. Only 5.1 inches long and weighs just 3.9 oz. Built with 25mm diameter tube. Click adjustable brightness control. Available in Black Matte or Silver Satin Finish. Every sight comes complete with a battery rubber eyepiece polarizing filter tube extension mounting rings and hex wrenches. We also back every sight with a LIFETIME WARRANTY. - The Original compact lightweight streamlined sight setting the standard that others still try to imitate. The latest generation Ultradot's follow in the tradition of the sight that started it all and take it a step further. The Ultradot 6 Matchdot II Ultradot 25 Ultradot 30 Matchdot L/T and Pan A-V.