Regulation meets design: A smoke detector saves lives. And now it also saves the life of design oriented people who did, until now, avoid installing the standard smoke detector in their designer homes and offices. c11 is a product innovation in the all over range of stand-alone smoke detectors. It works according to the principle of photoelectrical cells. It can be attached easily to the ceiling by means of a magnetic mechanism. It is unique due to the combination of materials like aluminum and plastics. By just changing the front of the smoke detector its look varies in color.