Truglo's Tru-Tec Red Dot Scope features digitial push-button controls, multiple brightness settings, ultra-long battery life (3V-CR2032 included), auto-on/off, ultra-lightweight/compact design, this sight is shock-resistant to 1000g and waterproof and fogproof. It comes with an integrated Weaver/Picatinny-style mounting system with both low and high mounting bases. This model has a 20mm objective and a 2 MOA dot reticle for precision aiming.