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Description: Use door/window sensors to protect anything that opens and closes, such as doors, windows, jewelry cases, and gun cabinets. The sensor detects intrusion with a magnet and reed-switch mechanism that signals an alarm during unauthorized entry. Features: Installs on anything that opens or closes For low and average traffic areas Specifications Magnet included Color: White Dimensions: 1.13" wide, 4.25" high, .88" deep Batteries: 2 AAA alkaline |