Wi-Fi smart smoke detector. This smoke detector detects both slow and fast burning fires. Controlled via an existing Wi-Fi network with the free Smart Life or Megos Smart Home app. Tuya compatible, supports Amazon Alexa and Google Home. Responds with a loud alarm and sends a notification via the app Silent mode to avoid false alarms caused by cooking or a steaming shower Piercing alarm signal, 85 db. System requirements: Android 5 or higher / iOS 11 or higher. Power supply via 5 year battery CR123A (replaceable). Suitable for wall & ceiling mounting. Dimensions: (W)86 x (D)86 x (H)31 mm. Incl. mounting material & battery.