2 Sets Home Wired Alarm Security Magnetic Door Contact Reed Sensor Switch, White

Dahszhi Home Security Wired Rolling Door Contact Magnetic Reed Switch Alarm

5Pcs Recessed Wired Security Window Gate Contact Sensor Alarm Magnetic Reed Swit

MC-31 Wired NC Magnetic Door Window Contact Sensor Alarm Reed Switch, 5 Pack

MC-38 Surface Mount Wired NC Door Sensor Alarm Magnetic Reed Switch White 2pack

Wired Door Contact Sensor NO Surface Mount Magnetic Reed Switch Black

Magnetic Reed Switch, 4 Pack NC Ring Alarm Contact Sensor Wired Recessed Door...

5 Pairs Recessed Magnetic Door Window Contact Sensor Alarm Reed Switch NC White