smart home zigbee window door sensor open/close alarm ewelink hub app real time notification work with alexa google smartthingsDescription:1.eWelink Smart ZigBee Door&Window Sensor:A ZigBee Wireless Gateway Hub is a must to work with the door&window sensor.2.Real-time remote monitoring:Whenever and wherever you are,once Door/Window Sensor detects external objects or animals, you will receive a notification by smart phone. Keep your house safe all the time.What you need to do is to keep your sensor with ZigBee hub connected.3.Battery powered for low power consumption;New designed with hall sensing technology and tamper protection;Low battery reminder supported.4.Easy installation with double-side tape,simply stick it anywhere you like to protect your house security.Make intelligent linkage with other smart devices to achieve a comprehensive idea of intelligenceSpecifications:Product Name:Door SensorWireless Type:ZigbeeBattery:CR2032Operating temperature:-10-50Operating humidity:0~95%Size:14*31*10mm(Min)25*49*12mm(Max)Package Included:Sensor*1User Manual*1Notes:Please be clear before purchase, this product needs to be used with a zigbee3.0 gateway