The NcStar Tactical Multi-Color Dot Sight w/ Cantilever Weaver Mount is made with you in mind when constructed of black anodized aluminum and featuring red, green and blue dots. the 30mm cantilever Weaver style mount allows you to mount onto most weaver style or picatinny rails. The Nc Star Multicolor Dot Sight has red, green, and Blue LEDs which are 100% safe for the eyes. To top it off there are three brightness settings for the red, green, and blue dots. The NcStar Tactical Red Dot Sight is just what you need to mount on your gun. Specifications for NcStar Tactical Red/Green/Blue Dot Sight w/ Cantilever Weaver Mount: Manufacturer: NcSTAR Color: Black Finish: Anodized Fabric/Material: Aluminum Magnification: 1 x Objective Lens Diameter: 35 mm Reticle: 3 MOA Dot Illumination Color: Red, Green, Blue Eye Relief: Unlimited Adjustment Click Value: 1 MOA Emitter Type: Enclosed Optical Coating: Platinum Battery Type: CR2032 Length: 5 in Width: 2.7 in Height: 3.1 in Weight: 8.9 oz Magnification Type: Fixed Quantity: 1 Attachment/Mount Type: Cantilever Mount, Weaver Features of NcStar Tactical Multi-Color Dot Sight w/ Cantilever Weaver Mount: Unlimited eye relief Black anodized aluminum construction Three brightness settings for the Red, Green, Blue Dots 30mm Cantilever Weaver Style Mount for mounting onto most Weaver Style/Picatinny rails Red, Green, and Blue LEDs (Light Emitting Diode) 100% safe for the eyes Package Contents: NcStar Tactical Red/Green/Blue Dot Sight w/ Cantilever Weaver Mount NcStar Tactical Red/Green/Bue Dot w/ Cantilever Weaver Mount