The NcSTAR DBB142 1X42mm Red Dot Tube Reflex Optic stands as a top choice for precision shooting. With its impressive 42mm objective lens, it ensures a vibrant and clear view of your target, while the unlimited eye relief allows for flexible mounting options. This optic is designed with user comfort in mind, featuring eye-safe LED technology. The seven-position rheostat allows you to adjust brightness for optimal visibility in any lighting. The rugged black anodized aluminum body guarantees durability, and the integrated Weaver style mount and included batteries enhance convenience. LED (Light Emitting Diode) 100% Safe for the Eyes Unlimited Eye Relief for flexible mounting Large 42mm Objective lens Seven Position Rheostat Knob for Multiple Brightness Settings Integrated Weaver style mount Powered by 3 Volt Lithium Batteries (CR2032) included Includes Extra Battery Black Anodized Aluminum Body Enhance your shooting experience with the NcSTAR DBB142 Reflex Optic, delivering clarity, versatility, and reliability.