NcStar 1x30 Tactical Red Dot Scope Sight w/ Flip Up Lens - Black Color - Aluminum Material - Covers Fits 3/8" Dovetails LED (Light Emitting diode) 100 percent safe for the eyes Comes in a black anodized aluminum body and an unlimited eye relief and field of view Seven position rheostat knob for multiple brightness settings Integrated 3/8-Inch dovetail mount and powered by three volt lithium battery (CR2032) Includes extra battery, lens covers, mounting tool