UHPPOTE Normal Closed Wired Screw-Terminal Surface-Mount Magnetic Contact for Window Door Security (Pack of 5)
- This Contact Works with Any Access Control or Burglar Alarm System Available.
- This contact can't connect directly to power, it works with your alarm system provide a switch signal. Working current under 12V.
- Great for use in family and factory window, door. etc..
- NC means Normally Closed: When the magnet together, the circuit is conductive (light on).
- When the magnet separate, the circuit is not conductive (light off)..