The Smoke Detector SMOKE-WE unit is a fully two way wireless 85dB photoelectric Smoke Alarm safety device which is easy to maintain with its removable smoke chamber and manual test button also the unit will alert residents when the Pyronix Enforcer SMOKE-WE battery is low or the unit has developed a fault it will begin to chirp once every 32 seconds so you and your family can sleep safely knowing that your home is protected also If your using the HomeControl+ Security System, you will receive a warning via the app, with notifications also possible through smartphone or tablet where set up.