LED (Light Emitting Diode) 100% safe for the eyes Anodized Aluminum body Heads up display Unlimited eye relief and field of view Seven Position rheostat knob for multiple brightness settings (3 green, 3 red) Powered by three volt lithium battery (CR2032) Includes extra battery, lens cover, mounting tool In the Box Specifications: MAGNIFICATION 1XOBJECTIVE DIA(MM) 24X34RETICLE MULTI RETICLE (4)DOT SIZE3 MOACLICK VAL 1 MOAEXTERIOR FINISH BLACK ALUMINUMLENS COATING RUBYN.W. (OZ.) 4.20LENGTH (IN) 3.25MOUNT INTEGRATED WEAVER STYLE California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov