![10Pcs 31B Magnetic Reed gap Switch NC NO Combined Door/Window Contact Sensor for Wireless Security Alarm System|Switches| - AliExpress 10Pcs 31B Magnetic Reed gap Switch NC NO Combined Door/Window Contact Sensor for Wireless Security Alarm System|Switches| - AliExpress](https://ae01.alicdn.com/kf/HTB1upU2iHZnBKNjSZFGq6zt3FXaR/10Pcs-31B-Magnetic-Reed-gap-Switch-NC-NO-Combined-Door-Window-Contact-Sensor-for-Wireless-Security.jpg_Q90.jpg_.webp)
10Pcs 31B Magnetic Reed gap Switch NC NO Combined Door/Window Contact Sensor for Wireless Security Alarm System|Switches| - AliExpress
![No/nc Wired Door Window Contact Magnetic Sensor Reed Switch - Buy Wireless Magnetic Reed Switch,No/nc Door Window Sensor,Electronic Sensor Switch Product on Alibaba.com No/nc Wired Door Window Contact Magnetic Sensor Reed Switch - Buy Wireless Magnetic Reed Switch,No/nc Door Window Sensor,Electronic Sensor Switch Product on Alibaba.com](https://sc04.alicdn.com/kf/HTB1zdkqaizxK1Rjy1zkq6yHrVXaU.jpg)
No/nc Wired Door Window Contact Magnetic Sensor Reed Switch - Buy Wireless Magnetic Reed Switch,No/nc Door Window Sensor,Electronic Sensor Switch Product on Alibaba.com
![10pcs/lot M 31A (NO model) White Door Window Contacts Magnetic Reed Switch Sensor for Wireless Security Alarm System|contact magnetic|sensor sensorsensor magnetic - AliExpress 10pcs/lot M 31A (NO model) White Door Window Contacts Magnetic Reed Switch Sensor for Wireless Security Alarm System|contact magnetic|sensor sensorsensor magnetic - AliExpress](https://ae01.alicdn.com/kf/HTB1c42WajnD8KJjSspbq6zbEXXa9/10pcs-lot-M-31A-NO-model-White-Door-Window-Contacts-Magnetic-Reed-Switch-Sensor-for-Wireless.jpg_Q90.jpg_.webp)
10pcs/lot M 31A (NO model) White Door Window Contacts Magnetic Reed Switch Sensor for Wireless Security Alarm System|contact magnetic|sensor sensorsensor magnetic - AliExpress
![Wireless Magnetic Contact Switch,Acogedor 433MHz Door Sensor Detector Switch for Home,Garage House,Warehouse, Enterprise and Shop Alarm Security: Amazon.com: Industrial & Scientific Wireless Magnetic Contact Switch,Acogedor 433MHz Door Sensor Detector Switch for Home,Garage House,Warehouse, Enterprise and Shop Alarm Security: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/31eXltal33L.jpg)