![Amazon.com: 2Sets Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device,DC 5V 12V 24V Light : Electronics Amazon.com: 2Sets Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device,DC 5V 12V 24V Light : Electronics](https://m.media-amazon.com/images/I/614t8OR-X2L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: 2Sets Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device,DC 5V 12V 24V Light : Electronics
![Amazon.com: 5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, for DC 5V 12V 24V Light (Black-B31) : Industrial & Scientific Amazon.com: 5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, for DC 5V 12V 24V Light (Black-B31) : Industrial & Scientific](https://m.media-amazon.com/images/I/61AQAFqiLgL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: 5Sets Magnetic Reed Switch, Magnetic Door Switch/Magnetic Contact Switch/Normally Open Closed NC NO Door Alarm Window Security, for DC 5V 12V 24V Light (Black-B31) : Industrial & Scientific
968XTP High-Security Magnetic Switch | Contact Sensors | Sensors | Contact Sensors | Honeywell Building Solutions
![Magnetic Reed Switch, 2pcs Normally Open Closed Simple Installation Magnetic Switch Fireproof For Door For Wall - Walmart.com Magnetic Reed Switch, 2pcs Normally Open Closed Simple Installation Magnetic Switch Fireproof For Door For Wall - Walmart.com](https://i5.walmartimages.com/asr/955b30a8-33c9-45a7-9feb-e3e139d1e060.616367f440bcc68568ebc2added0d97d.jpeg)