Sylvan Arms Airsoft Red Dot Sight - Product Details: The Sylvan Arms Red Dot Sight is for quick target Acquisition with eyes open, allowing the user a wider view and giving the advantage of maximum situational awareness. It is mostly maintenance free because its ruggedized miniature resilience makes it extremely tough yet light weight. A 3v battery provides the power for the LED red dot. Its easy to install, adjust, and operate. Magnification: 1X Dimensions: 46.5 x 35 x 31.5mm Weight: 60g (Battery Included) LED Red Dot illumination Dot Size: 2.0 MOA LED with adjustable brightness Red Coated Lens with a diameter of 22 X 16.5 Spiral Direction: Counter Clockwise Centerline: 22mm high Waterproof up to 10 m Shock resistance: 1000g