Bushnell 1x25 Trophy Series TRS-25 3 MOA Red Dot Scope with CR2032 Battery is an ultra-compact passive red dot gun sight. For fast target acquisition and accuracy in dim conditions, there's nothing like a red dot scope, and no one makes them like Bushnell. Bushnell has worked diligently with law-enforcement and military experts nationwide to design, test and prove the finest family of tactical shooting equipment in the industry. Each model in Bushnell Trophy Line uses the basic precepts of every red dot scope - unfailing reliability and optical precision - and takes them a step further with application-specific features such as tactical turrets for rapid adjustment, and a blacked-out finish for optimum concealment. This Bushnell Red Dot Sight can operate up to 3000 hours on one CR2032 battery.