YZIF Wired Metal Door Magnetic Contact Sensor Detector Garage Warehouse Security Switch Alarm

This is a set of magnetic detection switch used to protect doors and windows on your most; Easy to install and use, a good replacement for old contacts - Simple to install without problems protective monitors the opening and closing doors and windows High quality magnetic sensor contacts with strong magnetic, sensitive response and durability The fixed part with cable often is installed on the door frame and the corresponding part of link is mounted in the place of the door Usage for Ideal entry warning for homes, apartments, mobile homes, dorms, offices, hotel rooms, garages, and more, Manufacturer: YZIF