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10PCS Recessed Wired Window Door , Normally Closed NC, Door Alarm Magnetic Re...

10PCS Recessed Wired Window Door , Normally Closed NC, Door Alarm Magnetic Re...

$16.12
  • Condition: New
  • Ships from: Anaheim, US
  • Seller: yummam0 (99.6% positive)
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About this item

It consist of a reed switch part and a magnet part. When door closed, reed switch is effected by magnet and turn ON; when door open, reed switch is effected by magnet and turn OFF, trigger alarm. 【Normally Closed (NC)】Normally closed with 2 wires.

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