With a sleek and streamlined battery tray design, the Olight Osight C Red Dot Sight stays comfortabl to carry, quick to draw, and ideal for concealed or duty use. The Osight C powers on at the slightest movement and powers down after 3 minutes of inactivity using motion activated illumination. FeaturesLarge Field of View with 0.975" x 0.75" LensSide-Loading BatteryMulti Reticle SelectionMotion Activated IlluminationIntuitive Low Power Indication10 Adaptive Brightness Levels