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Anti-intruder security device that detects when a door or window is opened by third parties. |
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Air control devices for energy saving: on detecting that a window has been opened, it will (having been programmed) cut off the air conditioning or heating accordingly. |
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The smaller piece is installed on the edge of the window which is closest to the window opening. |
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The bigger piece is installed on the window frame and with its detecting side facing the magnet (the smaller piece). |