![Amazon.com : Door Window Alarm 2 Pack Noopel Home Security Sensor Burglar Anti-Theft 120DB Alarm with Batteries Included - DIY Easy to Install (2) : Electronics Amazon.com : Door Window Alarm 2 Pack Noopel Home Security Sensor Burglar Anti-Theft 120DB Alarm with Batteries Included - DIY Easy to Install (2) : Electronics](https://m.media-amazon.com/images/I/71PEFuDXvhL._AC_UF894,1000_QL80_.jpg)
Amazon.com : Door Window Alarm 2 Pack Noopel Home Security Sensor Burglar Anti-Theft 120DB Alarm with Batteries Included - DIY Easy to Install (2) : Electronics
![Amazon.com: 2 Pack, Door Window Alarm, Magnetic Burglar Alert Sensor with Batteries, Loud Door Alarms for Kids Safety, DIY for Home Security, Office Protection,Shopping Store : Electronics Amazon.com: 2 Pack, Door Window Alarm, Magnetic Burglar Alert Sensor with Batteries, Loud Door Alarms for Kids Safety, DIY for Home Security, Office Protection,Shopping Store : Electronics](https://m.media-amazon.com/images/I/51BD8Ty1JlL._AC_UF894,1000_QL80_.jpg)
Amazon.com: 2 Pack, Door Window Alarm, Magnetic Burglar Alert Sensor with Batteries, Loud Door Alarms for Kids Safety, DIY for Home Security, Office Protection,Shopping Store : Electronics
![Amazon.com: VILLCASE 5pcs Magnetic Wired Home Alarm System Door Alarm Access Control Replace Wired Alarm System Window Alarms Security Alarm Plastic Child Household Magnetic Sensor : Industrial & Scientific Amazon.com: VILLCASE 5pcs Magnetic Wired Home Alarm System Door Alarm Access Control Replace Wired Alarm System Window Alarms Security Alarm Plastic Child Household Magnetic Sensor : Industrial & Scientific](https://m.media-amazon.com/images/I/61cj4SDjDAL._AC_UF894,1000_QL80_.jpg)
Amazon.com: VILLCASE 5pcs Magnetic Wired Home Alarm System Door Alarm Access Control Replace Wired Alarm System Window Alarms Security Alarm Plastic Child Household Magnetic Sensor : Industrial & Scientific
![Amazon.com: WESUA 5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8" : Tools & Home Improvement Amazon.com: WESUA 5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8" : Tools & Home Improvement](https://m.media-amazon.com/images/I/41Hn2zT8DyL._AC_UF894,1000_QL80_.jpg)
Amazon.com: WESUA 5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8" : Tools & Home Improvement
![Amazon.com: Door Sensor, 120dB Wireless Home Window Door Magnetic Sensor Burglar Security Alarm System for Homes, Cars, Sheds, Caravans (no Battery Included) Amazon.com: Door Sensor, 120dB Wireless Home Window Door Magnetic Sensor Burglar Security Alarm System for Homes, Cars, Sheds, Caravans (no Battery Included)](https://m.media-amazon.com/images/I/41b139yShfL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Door Sensor, 120dB Wireless Home Window Door Magnetic Sensor Burglar Security Alarm System for Homes, Cars, Sheds, Caravans (no Battery Included)
![Amazon.com: GONLEN Mini Wireless Door Window Sensor Door Open Magnetic Contact Detector 433mhz 1527 for KONLEN WiFi GSM Alarm System : Electronics Amazon.com: GONLEN Mini Wireless Door Window Sensor Door Open Magnetic Contact Detector 433mhz 1527 for KONLEN WiFi GSM Alarm System : Electronics](https://m.media-amazon.com/images/I/41Db4fAN9RL._AC_UF894,1000_QL80_.jpg)
Amazon.com: GONLEN Mini Wireless Door Window Sensor Door Open Magnetic Contact Detector 433mhz 1527 for KONLEN WiFi GSM Alarm System : Electronics
![Amazon.com: Door Alarm Sensor Window Sensor Alarms for Home Security Kids Burglar Safety System 4pack/pcs : Electronics Amazon.com: Door Alarm Sensor Window Sensor Alarms for Home Security Kids Burglar Safety System 4pack/pcs : Electronics](https://images-na.ssl-images-amazon.com/images/I/41y2aWuoKML._AC_UL600_SR600,600_.jpg)
Amazon.com: Door Alarm Sensor Window Sensor Alarms for Home Security Kids Burglar Safety System 4pack/pcs : Electronics
![Amazon.com : SANJIE Sliding Door Alarm Window Alarms for Kids Home Safety| 120dB Loud Wireless Open Alarm with Battery for Dementia Patients Safety, Refrigerator, Pool Silver, 5 Pack Magnetic Sensor : Electronics Amazon.com : SANJIE Sliding Door Alarm Window Alarms for Kids Home Safety| 120dB Loud Wireless Open Alarm with Battery for Dementia Patients Safety, Refrigerator, Pool Silver, 5 Pack Magnetic Sensor : Electronics](https://m.media-amazon.com/images/I/71IKPuwQ-NL.jpg)
Amazon.com : SANJIE Sliding Door Alarm Window Alarms for Kids Home Safety| 120dB Loud Wireless Open Alarm with Battery for Dementia Patients Safety, Refrigerator, Pool Silver, 5 Pack Magnetic Sensor : Electronics
![Amazon.com: SECRUI Door Alarm for Home Security, Window Sensor, 120dB, 4 Modes, Easy Installation, Security Alarm for Kids Safety Home Garage Apartment Office (1 Pack) : Tools & Home Improvement Amazon.com: SECRUI Door Alarm for Home Security, Window Sensor, 120dB, 4 Modes, Easy Installation, Security Alarm for Kids Safety Home Garage Apartment Office (1 Pack) : Tools & Home Improvement](https://m.media-amazon.com/images/I/41w4XWwF2rL._AC_UF894,1000_QL80_.jpg)
Amazon.com: SECRUI Door Alarm for Home Security, Window Sensor, 120dB, 4 Modes, Easy Installation, Security Alarm for Kids Safety Home Garage Apartment Office (1 Pack) : Tools & Home Improvement
![Amazon.com: KERUI 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems : Electronics Amazon.com: KERUI 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems : Electronics](https://m.media-amazon.com/images/I/51u6pxdZm3L._AC_UF894,1000_QL80_.jpg)
Amazon.com: KERUI 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems : Electronics
![Amazon.com: 10pcs Door Window Sensors for Security, Magnetic Switch Alarm for Home Alarm System : Tools & Home Improvement Amazon.com: 10pcs Door Window Sensors for Security, Magnetic Switch Alarm for Home Alarm System : Tools & Home Improvement](https://m.media-amazon.com/images/I/5110LhBQavL._AC_UF894,1000_QL80_.jpg)
Amazon.com: 10pcs Door Window Sensors for Security, Magnetic Switch Alarm for Home Alarm System : Tools & Home Improvement
![Amazon.com: KERUI 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems : Electronics Amazon.com: KERUI 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems : Electronics](https://m.media-amazon.com/images/I/51u6pxdZm3L.jpg)
Amazon.com: KERUI 433MHz Wireless Door/Window Magnetic Sensor for GSM Home Security Alarm Systems : Electronics
![Amazon.com: Hiistar Wireless Entry Home Door Window Burglar Alarm, Security Alarm System Magnetic Sensor (Home Alarm 12 pcs) : Electronics Amazon.com: Hiistar Wireless Entry Home Door Window Burglar Alarm, Security Alarm System Magnetic Sensor (Home Alarm 12 pcs) : Electronics](https://m.media-amazon.com/images/I/71ujzOI0vrL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Hiistar Wireless Entry Home Door Window Burglar Alarm, Security Alarm System Magnetic Sensor (Home Alarm 12 pcs) : Electronics
![Amazon.com: WSDCAM Door and Window Alarm for Home Wireless Alarm Security System Magnetic Alarm Sensor Close Door Reminder Loud 110 dB, 4-in-1 Mode Window Alarms 10 Pack : Electronics Amazon.com: WSDCAM Door and Window Alarm for Home Wireless Alarm Security System Magnetic Alarm Sensor Close Door Reminder Loud 110 dB, 4-in-1 Mode Window Alarms 10 Pack : Electronics](https://m.media-amazon.com/images/I/71Bv-EMP2AL._AC_UF894,1000_QL80_.jpg)
Amazon.com: WSDCAM Door and Window Alarm for Home Wireless Alarm Security System Magnetic Alarm Sensor Close Door Reminder Loud 110 dB, 4-in-1 Mode Window Alarms 10 Pack : Electronics
![Amazon.com: Wired Door Window Sensor Magnetic Reed Switch NC Recessed for Home Alarm System (Pack of 10) : Tools & Home Improvement Amazon.com: Wired Door Window Sensor Magnetic Reed Switch NC Recessed for Home Alarm System (Pack of 10) : Tools & Home Improvement](https://m.media-amazon.com/images/I/51zVHbPQjLL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Wired Door Window Sensor Magnetic Reed Switch NC Recessed for Home Alarm System (Pack of 10) : Tools & Home Improvement
![Amazon.com: Fuers Security Window/Door Alarm Contacts,2-Pack,Battery Operated Wireless Burglar Alert Magnetic Sensor Alarm Easy Installation DIY Protection for Home, Garage,Apartment,Office,Kids Safety,Travel : Electronics Amazon.com: Fuers Security Window/Door Alarm Contacts,2-Pack,Battery Operated Wireless Burglar Alert Magnetic Sensor Alarm Easy Installation DIY Protection for Home, Garage,Apartment,Office,Kids Safety,Travel : Electronics](https://m.media-amazon.com/images/I/61Cy07oDb2L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Fuers Security Window/Door Alarm Contacts,2-Pack,Battery Operated Wireless Burglar Alert Magnetic Sensor Alarm Easy Installation DIY Protection for Home, Garage,Apartment,Office,Kids Safety,Travel : Electronics
![SECRUI Door Alarm for Home Security, Window Sensor, 120dB, 4 Modes, Easy Installation, Security Alarm for Kids Safety Home Garage Apartment Office (2 Pack) - Amazon.com SECRUI Door Alarm for Home Security, Window Sensor, 120dB, 4 Modes, Easy Installation, Security Alarm for Kids Safety Home Garage Apartment Office (2 Pack) - Amazon.com](https://m.media-amazon.com/images/I/51eHPdG-LgL._AC_UF894,1000_QL80_.jpg)
SECRUI Door Alarm for Home Security, Window Sensor, 120dB, 4 Modes, Easy Installation, Security Alarm for Kids Safety Home Garage Apartment Office (2 Pack) - Amazon.com
![Amazon.com: 5Sets NC Magnetic Reed Switch MC 38 Mount Wired Door Window Sensor Recessed Alarm Security System Normally Closed, White : Tools & Home Improvement Amazon.com: 5Sets NC Magnetic Reed Switch MC 38 Mount Wired Door Window Sensor Recessed Alarm Security System Normally Closed, White : Tools & Home Improvement](https://m.media-amazon.com/images/I/51vnnjLyb+L._AC_UF894,1000_QL80_.jpg)
Amazon.com: 5Sets NC Magnetic Reed Switch MC 38 Mount Wired Door Window Sensor Recessed Alarm Security System Normally Closed, White : Tools & Home Improvement
![Door Alarm Remote Control Door Chime with Adjustable Volume Door Open Magnetic Sensor for Kids Safety Home Security Teenager Pets Sneaking Out Wireless Door Window Alarm System Apartment Business - Amazon.com Door Alarm Remote Control Door Chime with Adjustable Volume Door Open Magnetic Sensor for Kids Safety Home Security Teenager Pets Sneaking Out Wireless Door Window Alarm System Apartment Business - Amazon.com](https://m.media-amazon.com/images/I/51T3erxznPL._AC_UF894,1000_QL80_.jpg)
Door Alarm Remote Control Door Chime with Adjustable Volume Door Open Magnetic Sensor for Kids Safety Home Security Teenager Pets Sneaking Out Wireless Door Window Alarm System Apartment Business - Amazon.com
![Amazon.com: GE Personal Security Window and Door Alarm, 2 Pack, DIY Protection, Burglar Alert, Wireless Chime/Alarm, Easy Installation, Home Security, Ideal for Home, Garage, Apartment and More, 45115 White : Electronics Amazon.com: GE Personal Security Window and Door Alarm, 2 Pack, DIY Protection, Burglar Alert, Wireless Chime/Alarm, Easy Installation, Home Security, Ideal for Home, Garage, Apartment and More, 45115 White : Electronics](https://m.media-amazon.com/images/I/81EiMKvVqlL.jpg)
Amazon.com: GE Personal Security Window and Door Alarm, 2 Pack, DIY Protection, Burglar Alert, Wireless Chime/Alarm, Easy Installation, Home Security, Ideal for Home, Garage, Apartment and More, 45115 White : Electronics
![Amazon.com: 2 Pack Wireless Door Window Alarm, Magnetic Burglar Alert Sensor, Loud Door Alarms for Kids Safety, DIY for Home Security, Office Protection,Shopping Store AAA Battery : Electronics Amazon.com: 2 Pack Wireless Door Window Alarm, Magnetic Burglar Alert Sensor, Loud Door Alarms for Kids Safety, DIY for Home Security, Office Protection,Shopping Store AAA Battery : Electronics](https://m.media-amazon.com/images/I/51Na5xAq0SL._AC_UF894,1000_QL80_.jpg)
Amazon.com: 2 Pack Wireless Door Window Alarm, Magnetic Burglar Alert Sensor, Loud Door Alarms for Kids Safety, DIY for Home Security, Office Protection,Shopping Store AAA Battery : Electronics
![Amazon.com: 10pcs NC Recessed Wired Door Window Sensor Magnetic Switch for Home Security Alarm System : Tools & Home Improvement Amazon.com: 10pcs NC Recessed Wired Door Window Sensor Magnetic Switch for Home Security Alarm System : Tools & Home Improvement](https://m.media-amazon.com/images/I/51sdEOwYjgL.jpg)
Amazon.com: 10pcs NC Recessed Wired Door Window Sensor Magnetic Switch for Home Security Alarm System : Tools & Home Improvement
![Amazon.com : Door Window Alarm Sensor with Remote: 120db Pool Alarm When Doors Opening Sliding, Wireless Magnetic Home Security Sensors Alarm for Kids Child Toddler Dementia Safety : Electronics Amazon.com : Door Window Alarm Sensor with Remote: 120db Pool Alarm When Doors Opening Sliding, Wireless Magnetic Home Security Sensors Alarm for Kids Child Toddler Dementia Safety : Electronics](https://m.media-amazon.com/images/I/41Sv8Os3IwS.jpg)
Amazon.com : Door Window Alarm Sensor with Remote: 120db Pool Alarm When Doors Opening Sliding, Wireless Magnetic Home Security Sensors Alarm for Kids Child Toddler Dementia Safety : Electronics
![Amazon.com : VictorsHome Magnetic Reed Switch RC-33 NO Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 5 Pcs : Electronics Amazon.com : VictorsHome Magnetic Reed Switch RC-33 NO Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 5 Pcs : Electronics](https://m.media-amazon.com/images/I/51SsYQWC3HL._AC_UF894,1000_QL80_.jpg)
Amazon.com : VictorsHome Magnetic Reed Switch RC-33 NO Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 5 Pcs : Electronics
![Amazon.com : Mengshen Wireless Home Door Window Burglar Alarm DIY Safety Security Alarm System Magnetic Sensor with Remote Control - 2 Alarm 1 Remote Control M642 : Electronics Amazon.com : Mengshen Wireless Home Door Window Burglar Alarm DIY Safety Security Alarm System Magnetic Sensor with Remote Control - 2 Alarm 1 Remote Control M642 : Electronics](https://m.media-amazon.com/images/I/619uwGMDjdL._AC_UF894,1000_QL80_.jpg)