Quick to install and simple to use. Everything needed to start protecting a whole home. Place a motion detector in a chosen room and mount a contact sensor on a door or window frame to receive notifications the moment someone enters a room, or opens a window or a door. Works with - Amazon Alexa - Google Home - iOS App - Android App App Alerts Zone Control for Part-Arming Not Pre-Linked Anti-Tamper Expand System with up to 100 Accessories Detector Testing Great for Flats or Smaller Houses Hub Not Required Works with - Amazon Alexa - Google Home - iOS App - Android App App Alerts Zone Control for Part-Arming Not Pre-Linked Anti-Tamper Expand System with up to 100 Accessories Detector Testing Great for Flats or Smaller Houses Hub Not Required