1 Pcs White Recessed Door Contacts Nc Security Alarm Window Sensors With Magnetic Reed Switch. These Door Contact Position Switches (Dcs) Work With All Access Control And Burglar Alarm Systems

1 Pcs White Recessed Door Contacts Nc Security Alarm Window Sensors With Magnetic Reed Switch. These Door Contact Position Switches (Dcs) Work With All Access Control And Burglar Alarm SystemsSteel D...