Door Window NO/NC Recessed Security Contact Sensor Alarm Magnetic Reed Switch

Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch

2 Pack Magnetic Reed Switch NO NC Waterproof 12V Door Window Sensor Alarm

10Pack N.C. Recessed Wired Security Window Door Contact Sensor Alarm Reed Switch

2 x RC-33 NC Recessed Wired Security Window Door Contact Sensors White

Recessed Security Alarm Contacts Door Window Sensor Magnetic Reed Switch

Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White MC-38

10X N.C. Recessed Wired Security Contact Sensor Alarm Magnetic Reed Switch