Receive a smartphone notification even before a break-in Be alerted if you leave a window open Install your sensors easily on any door or window Benefit from a complete Smart Alarm System by adding the Netatmo Indoor Siren Take action even before an intruder breaks into your homeThe Smart Door and Window Sensors alert you to a problem even before a break-in occurs. Installed on the doors and windows of your choice, they can tell if someone is trying to force entry. They also detect when a door or window is opened suddenly and send an immediate notification to your smartphone. This saves you valuable time in the event of a break-in.See whether doors and windows are open or shut - directly in the appYou can adjust the settings in your app to keep an eye on your home at all times by configuring the Smart Door and Window Sensors to send you a smartphone notification if a door or window is kept open too long. Just left home but think you might have left something open? You can check whether