2-Piece Set of Adjustable Nylon and Iron Levelling Feet for Furniture – Non-Slip and Vibration-Damping, Sturdy for Furniture and Equipment

One door and window sensor unit only; this product cannot be used alone. You must use our Smart Home Hub.
The alarm is activated when the door or window is opened. Note: The distance between the door sensors is less than 1 cm.
Remove the insulating film before use. Easily attaches with 3M adhesive tape.
The main unit of the door/window sensor and the magnetic strip are installed on the door/window and the door/window frame, respectively.
Powered by one 23V 12V alkaline battery (battery included).