Quick Setup, modern design, color ring lights, red = green = white = ok dangers pilot, he speaks during configuration to guide you and if problems after alarm then communicates with your smartphone, numerous option "vapor water "if near a bathroom (false alarm avoided), pilot night and your historical record in its ignition and communicates with the thermostast nest: the boiler cut in case of anomalies, presence strengthens the detection of th. ; Big advantage of these detectors, communication between them give the location of the anomaly in alarm will be activated every avoiding the first sensor price of your room on the 2nd floor late sounds when the floor is in default ... Benefit for the wired supply 220v could know if there is a power cut you at your home and know its duration with your smartphone. A point to note: the connector exceeds the bass and no slot in the interior of the detector for connecting the impossible son of place on flat surface obligation to have a built-in housing to put the wired detector top with its connector and wired connection. Life of 7 years expected sensor.