![Amazon.com: NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch for Alarm System Access Control Replace : Electronics Amazon.com: NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch for Alarm System Access Control Replace : Electronics](https://m.media-amazon.com/images/I/51xdgfL883L._SL1500_.jpg)
Amazon.com: NC NO Magnetic Switch Wired Recessed Door Sensor Hidden Window Contact Reed Switch for Alarm System Access Control Replace : 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 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/51M9-PIEkVL.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 : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics](https://m.media-amazon.com/images/I/5135eK5Ez0L._AC_SL1100_.jpg)
Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics
![Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics](https://m.media-amazon.com/images/I/41pitE379tL._CR0,0,640,338_SR580,306_.jpg)
Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics
![Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific](https://m.media-amazon.com/images/I/71Y9fcAoOFL._SL1001_.jpg)
Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : 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._SL1500_.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: CDDQ Reed Screen - Valla de privacidad para jardín, valla de bambú natural altamente densa, decoración de pared, paneles de línea dividida, 2/3 pies de alto (tamaño de altura: 2.6 pies Amazon.com: CDDQ Reed Screen - Valla de privacidad para jardín, valla de bambú natural altamente densa, decoración de pared, paneles de línea dividida, 2/3 pies de alto (tamaño de altura: 2.6 pies](https://m.media-amazon.com/images/I/81reXmxPfqL._AC_SX425_.jpg)
Amazon.com: CDDQ Reed Screen - Valla de privacidad para jardín, valla de bambú natural altamente densa, decoración de pared, paneles de línea dividida, 2/3 pies de alto (tamaño de altura: 2.6 pies
![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://images-na.ssl-images-amazon.com/images/I/51oMoPMElbL._AC_UL160_SR160,160_.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: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific](https://m.media-amazon.com/images/I/61RbgM2tO0L._SL1001_.jpg)
Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific
![Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics](https://m.media-amazon.com/images/I/41lBprR2yVL._AC_SX569_.jpg)
Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics
![Quick Switch QS-910MD Surface Mount Small Switch Door/Windo Contact (Closed Loop with Leads) 10-Pack : Tools & Home Improvement - Amazon.com Quick Switch QS-910MD Surface Mount Small Switch Door/Windo Contact (Closed Loop with Leads) 10-Pack : Tools & Home Improvement - Amazon.com](https://m.media-amazon.com/images/I/51UbnE1Rs-L._AC_SX679_.jpg)
Quick Switch QS-910MD Surface Mount Small Switch Door/Windo Contact (Closed Loop with Leads) 10-Pack : Tools & Home Improvement - Amazon.com
![Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics](https://m.media-amazon.com/images/I/51r-lcFPLPL._AC_SX679_.jpg)
Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics
![Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific](https://m.media-amazon.com/images/I/516oPoABEML._SL1001_.jpg)
Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific
![Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific](https://m.media-amazon.com/images/I/61grEmU658L._SL1001_.jpg)
Amazon.com: Magnetic Switch A Pair Normally Closed Door Window Reed Switch Metal Housing Micro Alarm Magnetic Contact Security for Metal Door Window : Industrial & Scientific
![Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics](https://m.media-amazon.com/images/I/61AOX4HDWFL._AC_SX522_.jpg)
Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : 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 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/S/aplus-media/sc/8614461e-2244-4c24-be23-223eb2a48a3a.__CR0,0,300,300_PT0_SX300_V1___.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: Heyiarbeit MC-31 Surface Mount Wired NO Home Security Door Contact Sensor Alarm Magnetic Reed Switch 1pcs : Tools & Home Improvement Amazon.com: Heyiarbeit MC-31 Surface Mount Wired NO Home Security Door Contact Sensor Alarm Magnetic Reed Switch 1pcs : Tools & Home Improvement](https://m.media-amazon.com/images/I/41nCAWecXUL._AC_SY355_.jpg)
Amazon.com: Heyiarbeit MC-31 Surface Mount Wired NO Home Security Door Contact Sensor Alarm Magnetic Reed Switch 1pcs : Tools & Home Improvement
![Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics](https://m.media-amazon.com/images/I/61AOX4HDWFL._AC_SL1100_.jpg)
Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics
![Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics](https://m.media-amazon.com/images/I/61KbxUrr90L._AC_SL1500_.jpg)
Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : 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 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/51-TpP6OFJL._SX425_.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: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics](https://m.media-amazon.com/images/I/41on9fD17QS._AC_SL1000_.jpg)
Amazon.com: 10 Sets Pack of Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape : Electronics
![Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : Electronics](https://m.media-amazon.com/images/I/51yf1uih66L._AC_SL1100_.jpg)
Amazon.com : VictorsHome Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 10 Pcs : 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 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/51UN-T-bOaL._SL1100_.jpg)