The Tedee Door Sensor adds real-time door position monitoring for smarter security and automation. It shows whether a door is open or closed in the Tedee app alongside lock status, helping prevent auto-locking when the door is ajar. The sensor can send alerts if a door is left open and keeps a history of door activity. Easy adhesive installation and a long-life CR2032 battery deliver up to two years of use, with remote access available via a Wi-Fi-connected Tedee Bridge.