Smart Wi-Fi Door & Window Sensor

Wi-Fi sensor for doors and windows, through which you can tell if the door or window is open or closed. It is characterized by recording all movements and showing alerts by phone while you are outside the house, specified by the date and time when the door or window was opened. It is easy to use and can be installed any adhesive in the two pieces and does not require screws for installation. Support Alexa & Google Assistant. It works by batteries and does not require charging. Control App: Smart Life. Note: The two pieces must be installed with a maximum distance of 20mm between the first and second device.