The alarm sound of this smoke detector cannot be switched off via the app or remote control, as the device is battery-operated and does not receive any commands from the Zigbee coordinator. To mute or reset the alarm, the button must be pressed directly on the detector. This is for security purposes to ensure that an alarm is checked on site and not just automatically deactivated. However, the sensor can be used for automation, whereby the alarm sound cannot be deactivated.