The need to use app in conjunction with the companys door accessories, either at home or go out through the app, you can know the current status of the door (open or closed), the accessories can be installed on the door, window, drawer etc.The app can be set by magnetic work mode, or work time, when the door is opened when the weather magnetic even can prompt the brief, if in the future there is rain or snow within 12 hours, it will prompt you to close the door or window.