The Aqara Door and Window Sensor T1 is a compact security device designed to monitor the opening and closing of various entry points in your home. Using the Zigbee 3.0 wireless protocol, it connects to an Aqara Hub to integrate with ecosystems like Apple HomeKit, Amazon Alexa, Google Home, and Matter, allowing you to create automated routines based on whether a door is open or shut. Measuring just 41 × 22 × 11 mm, the sensor has a discreet profile that blends into most frames. It operates using a CR1632 battery and can detect changes in state at a distance of up to 22 mm between the sensor unit and its magnet. You can easily install it on doors, windows, drawers, or even mailboxes using the included adhesive strips. This device is built to function in environments ranging from -10 °C to 45 °C with humidity levels up to 95%, making it versatile for different rooms or air conditioning units. To keep the system current, it supports OTA firmware updates, ensuring you have the latest improvements without needing to replace the hardware.