100% Safe for the Eyes with LED lighting. Absolute eye relief for flexible mounting. Standard On/Off switch for operation. Powered by 3 volt lithium batteries (CR2032) *included. Additional CR2032 battery included. Composed of quality aluminum and polymer. Features red dot reticle w/ 22.0 x 33.0mm objective lens. In the Box 1X Red Dot Optic 1X Battery Specifications: Brand NcStar Build Anodized Aluminum Weight 0.17 lbs Length 4.73 Inches Magnification 1x Objecive Diameter 22 x 33 Click Value MOA Dot Color RED Finish Anodized Battery 1X CR2032 (Included) Color BLACK California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov