Door Sensor ZigBee/WiFi Window Alarm Detector Security Smart Alerter Office/Home
WiFi:802.11 b/g/n. Alarm Current:≤130mA. Permanent magnet: 43 10 14mm. Battery: DC 3V LR03（AAA battery，not included）. 【Detect door/window status 】When the door/window is opened or closed,the device triggered and push notification to the phone.