WiFi Door Alarm System, Smart Home Security System, with Phone APP Alert, Contact Sensor Wireless Intelligence Without Hub for Garage Doors, Skylights, Safes, Cabinets, Refrigerator Doors - Septpenta, Septpenta3og0na4uxy

• DOOR OPEN ALARM: Able to detect the door open status, the window sensor also enables 5mm offset and nearly 1cm gap, ensuring high safety. EXTENSIVE USING: Suits perfectly for garage doors, skylights, safes, cabinet, refrigerator doors, drawers, safe box and so on, very useful. SIMPLER CONTROL: In the 2.4G network, just connect your smart door magnetic sensor to the application for convenient control and operation. FASTER ALARMING: When the status of the protected device changes, you will receive timely alert notifications from the smartphone application. EASY TO INSTALL: 2pcs double sided tape are also included, ensure that the surface is clean and dry and can be pasted on any door or window.