Truglo's Tru-Tec Red Dot sight features digital push-button controls, multiple brightness settings, ultra-long battery life (CR123A included). It utilizes a programmable auto-off, click windage and elevation adjustments, integrated lanyard system that prevents loss of W/E caps, and an ultra-durable design. It is shock-resistant to 1000g and waterproof and fogproof. The Tru-Tec Red Dot comes with an quick-detach mounting system compatible with standard Picatinny/Weaver-style rails.This model has a 30mm objective and a 2 MOA dot reticle for precision aiming.