![2pcs/1pair 31b Magnetic Reed Switch Nc No Combined Door Contact Sensor Wireless Security Switches - Window Door Sensor - AliExpress 2pcs/1pair 31b Magnetic Reed Switch Nc No Combined Door Contact Sensor Wireless Security Switches - Window Door Sensor - AliExpress](https://ae01.alicdn.com/kf/HTB1SIsxajLuK1Rjy0Fhq6xpdFXaB/2pcs-1pair-31B-Magnetic-Reed-Switch-NC-NO-Combined-Door-Contact-Sensor-Wireless-Security-Switches.jpg)
2pcs/1pair 31b Magnetic Reed Switch Nc No Combined Door Contact Sensor Wireless Security Switches - Window Door Sensor - AliExpress
![Amazon.com: Rolling Door Contact Magnetic Reed Switch Alarm Wireless Wired Door Contact Magnetic Sensor Detector for Rolling Gate Home Security System : Electronics Amazon.com: Rolling Door Contact Magnetic Reed Switch Alarm Wireless Wired Door Contact Magnetic Sensor Detector for Rolling Gate Home Security System : Electronics](https://m.media-amazon.com/images/I/71p9gNXkdHL.jpg)
Amazon.com: Rolling Door Contact Magnetic Reed Switch Alarm Wireless Wired Door Contact Magnetic Sensor Detector for Rolling Gate Home Security System : Electronics
BOSCH, Radion Series, Wireless reed switch, For doors/windows/dry contact devices, Integrated magnetic reed switch, Supervised sensor loop, Suits RF3212E & B810 receivers, 433MHz
![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
![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)