When the doors and windows are opened, the main frame will send out a high decibel alarm and the APP will push a message; the window status is pre-sented dynamically and the situation at home is clear at a glance.
When the doors and windows are opened, the main frame will send out a high decibel alarm and the APP will push a message; the window status is pre-sented dynamically and the situation at home is clear at a glance.