Sig's Romeo4 Compact Red dot is fast, accurate and its target acquisition is ideal. The unlimited eye-relief allows you to acquire the aiming point and target, and MOTAC (Motion Activated Illumination) powers up when it senses motion and powers down when it does not providing optimum operational safety and enhanced battery life. It includes clear flip-open covers. This Romeo4S model features a solar panel. It has a graphite gray finish and a 2 MOA Red Dot Ballistic Circle Dot reticle.