Magnetic Contact Reed Switch Door Window Sensor Entry Security Alarm N/C MC-38

Wired Door Contact Sensor NC Surface Mount Magnetic Reed Switch Black

Zigbee Smart Door Window Sensor Ewelink App Security Alarm Works with Alexa

2pcs MC-38 Surface Mount Wired NC/NO Door Sensor Alarm Magnetic Reed Switch New

5PCS MC-38 N/C Door Window Contact Sensor Magnetic Switch for Home Alarm System

1-5PCS RC-33 NC/NO Recessed Wired Door Contact Sensor Alarm Magnetic Reed Switch

Swann Compact Window and Door Magnetic Alarm Sensor, 110DB+ #SW351-MDA - SEALED!

Tapo T110 Smart Door Alarm, Window Door Alarm Sensor with Real-Time Monitoring