UHPPOTE Wired Roller Door Contact NC/NO w/ Bracket

UHPPOTE Wired Shutter Roller Magnetic Overhead Door Contact Output NC/NO with Bracket is a great choice for use in family and factory windows, doors, etc. This contact works with any access control or burglar alarm system available and features a switch type of NC/NO. When the magnet is separated, the circuit is conductive (light on) for NO and not conductive (light off) for NC. When the magnet is together, the circuit is not conductive (light off) for NO and conductive (light on) for NC. This contact is reliable and easy to install, making it a great choice for any access control or burglar alarm system.