Feature:1. Real Time Monitor: Keep your home safe and secure with this smart window sensor, which detects when a window is opened or closed, and push notification to your phone.2. Stable Connection: With the help for ZigBee technology, door sensors come with stable connectivity and fast response to ensure you receive security alerts in time.3. Long Battery Life: The batteries provide a long lasting power supply, ensuring the door sensor operates efficiently, environmentally friendly, to provide you with lasting security.4. Wide Compatibility: Wifi door open sensor is compatible for tuya smart home devices, making it easy to provide a smarter and more convenient home life for you.5. Easy Installation: No need for complicated wiring. This wireless door sensor can be easily installed using adhesive tape or screws without professional personnel help, save time.Specification:Item Type: Smart Door and Window SensorMaterial: ABSFunction: Detect if the door is open or closed and push the notification to the phoneBattery Type: Alkaline BatteryBattery Model: AA battery (Shipped without batteries)Battery Quantity: 2Standby Current: 6.5uaOperating Temperature: 0 ~ 40 Operating Humidity: 20% ~ 85%Operating Time: 5000Wireless Frequency: 2.4GHzWireless Protocol: For Zigbee 3.0, for IEEE 802.15.4Network Range: Approx. 55m / 180.4ftMain Body Size: Approx. 8 x 4 x 2cm / 3.1 x 1.6 x 0.8in Small Body Size:Approx.8 x 2 x 1cm / 3.1 x 0.8 x 0.4in .Package List:1 x Sensor Host 1 x Sensor Auxiliary 1 x Instructions