Feature:1. Intelligent door and window sensor, automatically activated when the door or window is opened or invaded by external objects, and immediately pushes the information to the APP, perfect for home alarm system.2. Supports ZigBee 3.0 protocol, can be used with compatible Zigbee hubs or Echodevices with built-in Zigbee hubs, supports smart home device linkage.3. The phone APP provides low battery reminders, allowing you to replace the battery in a timely manner, and also allows you to view the history records, making every door and window switch traceable.4. Small and lightweight, easy to install and use, no need to drill holes, just stick the sensor in the appropriate position. Allows for gaps up to 10mm wide.5. Widely applicable, perfect for installation in homes, shops, offices, classrooms, and other different scenarios, upgrading your alarm system.Specification:Upgrade your safety system with this intelligent door and window sensor. Automatically alerting you through the APP when doors or window are opened, this sensor supports ZigBee 3.0 protocol for smart home integration. With low battery reminders and a history log, this easy-to-install sensor is perfect for homes, shops, offices, and classrooms. Stay protected and connected with the versatile and reliable sensor.Features:Intelligent door and window sensor, automatically activated when the door or window is opened or invaded by external objects, and immediately pushes the information to the APP, perfect for home alarm system.Supports ZigBee 3.0 protocol, can be used with compatible Zigbee hubs or Echodevices with built-in Zigbee hubs, supports smart home device linkage.The phone APP provides low battery reminders, allowing you to replace the battery in a timely manner, and also allows you to view the history records, making every door and window switch traceable.Small and lightweight, easy to install and use, no need to drill holes, just stick the sensor in the appropriate position. Allows for gaps up to 10mm wide.Widely applicable, perfect for installation in homes, shops, offices, classrooms, and other different scenarios, upgrading your alarm system.Specifications:Color: WhiteMaterial: ABSProtocol: ZigBee3.0Battery: 1 * CR2032 Button BatteryItem Size: 50 * 25 * 12mm/ 2.0 * 1.0 * 0.5in 30 * 15 * 10mm/ 1.2 * 0.6 * 0.4inItem Weight: 22g/ 0.8ozPackage Size: 55 * 45 * 20mm/ 2.2 * 1.8 * 0.8inPackage Weight: 29g/ 1.0ozPacking List:1 * Door/Window Sensor Kit2 * Double-Sided Adhesive1 * Card Pin1 * User's ManualPackage List:1 * Door/Window Sensor Kit2 * Double-Sided Adhesive1 * Card Pin1 * User's Manual