3 White ABS Surface Mount Normally Closed Door Contact Switch with 11″ Pigtail
.2 Amp Maximum Switch Current
Will make Sense Door Closer at Roughly ¾” or 15mm
This Contact Works with Any Access Control or Burglar Alarm System Available
NORMALLY CLOSED: When the door or window is open, the contact will give an open signal and when the door is closed the contact will give a closed (circuit) signal.