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【Enjoy the smart life of the future】when you go away, It will push notification message to your phone when the door/window opens and closes, so you can discover the intruder in time. Furthermore, you could share the smart sensor to your familes and track the history of sensor activities.
【Compatible with Alexa & Google home & ifttt】simply use your voice to control the connected devices by Amazon echo or Google home. Convenient for you to detect your doors, windows, garage, cabinets, drawers or anywhere you want to notified when it is opened or closed.$18.88