LED (Light Emitting Diode) 100% safe for the eyes; Unlimited Eye Relief for flexible mounting; Large 40mm Objective lens for a wide field of view; Adjustable Quick Release Mount fits virtually any weaver/Picatinny type rails; Integrated Red (Class IIIa) Laser that is fully adjustable for zero; Powered by 3 Volt Lithium Batteries (CR2032) included; Includes extra battery and adjustment tools; Black Anodized Aluminum Body