Fortress Security Store (TM) Window & Door Contact Sensor for S02 or GSM DIY Home Alarm Systems
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<b>[Product Information]</b><br>
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<li>Designed to detect a window or door being opened.</li>
<li>Totally wireless : communicates remotely with the S02 / GSM central system</li>
<li>Attaches to any door or window</li>
<li>Requires one 23A battery</li>
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