The PX-1 smoke detector is a high-quality product that is not only one of many, but offers real new technological developments. The smoke detector PX-1 combines highly developed electronics with innovative functionality, smallest measurements, absolute reliability and timeless design. The PX-1 has no disturbing control elements such as test buttons or LEDs. The smoke detector PX-1 is timelessly modern at highly variable at the same time. The lower unit cover can be removed and individually decorated. The PX-1 has a Test-Stop-Button that is especially user-friendly: the whole lower unit cover is equipped with latest sensor technology. The smoke detector “feels” if a test alarm is triggered by touching the surface or the alarm mode is deactivated.