Specification: 100% Brand New Up to 600 meter 5.56/.223 Green illuminated (at day light only) BDC reticle Powered by fiber source, providing more bright environment and reticle illumination at day. There is no on/off switch on a red dot, but due to light sensor Adjustable windage and elevation Multi-coated front lens. Easily installed on any 20 mm Picatinny rail. Objective diameter: 32 mm Magnification: 4X Eye relief: 1.5" Combined Weight: 460g Manufactured in China