NcStar 1x40 Red dot sight with built in Red laser. Features: - Unlimited eye relief - built in fully adjustable laser sight - five brightness settings for Red dot sight - ability to use Red dot or laser individually, or both at the same time - built in quick release mount for use with most Weaver style/Picatinny rails - LED (light Emitting Diode) 100% safe for the eyes. Specifications: - material: black anodized aluminum - length: 4.35in - width: 3.45in - height: 3in - weight: 11.3oz - mount length: 3in - objective lens diameter: 40mm - magnification: 1x - reticle type: Red dot - dot size: 3 MOA - click value: 1 MOA - lens coating: Ruby - battery type: CR2032 - laser maximum output power: 5mW - laser wavelength: 635-655nm