Smart door and window sensor that delivers instant alerts and scene linkage through a companion app when paired with a Zigbee gateway. Designed for responsive monitoring of doors, windows, cabinets, and drawers, it supports 2.4GHz WiFi and requires a Zigbee gateway to enable smart home automation. Key benefits Reliable intrusion detection: Ultrasensitive sensing detects door or window openings immediately and sends alerts so you can respond quickly. Seamless automation: Link the sensor to smart switches and other devices through the companion app to trigger actions such as turning on lights when doors open. Flexible installation: Works in a variety of locations around the home for broad coverage and practical everyday use. What it does and how it helps Detects opening and closing events and notifies your phone, helping you monitor access and activity without constant checking. Enables automated scenes through the companion app and a Zigbee gateway, simplifying tasks like lighting control and security routines. Accommodates gaps up to 0.79in between sensor and magnet for reliable performance in typical door and window setups. Compatibility and requirements Supports 2.4GHz WiFi only; not compatible with 5GHz networks. Requires a Zigbee gateway and the companion app for full smart home linkage and automation features. Practical use scenarios Front door lighting: Automatically switch on hallway or porch lights when the front door opens for safer arrival at night. Window or patio monitor: Receive alerts if a window opens while you are away, helping you check and secure the home remotely. Cabinet and drawer access: Track openings on medicine cabinets, tool chests, or storage drawers to monitor usage or prevent unauthorized access. Simple, focused functionality for everyday security and automation.