Door window sensor | from 18 to 21

TP-Link T110 Smart Door and Window Sensor

Smart door and window sensor, detects opening and closing, sending alerts to your device for added home security.

KERUI 2pcs Wireless Infrared Door and Window Gap Sensors for Home Security Alarm System

Home Security Alarm System with Magnetic Contact Sensors for Metal Rolling Gates and Windows, NO NC Available

Wireless Motion Detection Alarm with Remote Control for Doors and Windows

Standalone Wireless Home Security Alarm System with Magnetic Sensors for Doors and Windows

Standalone Wireless Home Security Alarm System with Magnetic Sensors for Doors and Windows

Standalone Wireless Home Security Alarm System with Magnetic Sensors for Doors and Windows

Sonoff ZigBee Smart Home Wireless Gateway with Temperature, Humidity, Motion, and Door/Window Sensors

Sonoff ZigBee Smart Home Wireless Gateway with Temperature, Humidity, Motion, and Door/Window Sensors

Wireless Magnetic Door and Window Alarm Sensor - 120dB Home Security Guardian

5 Pair RC-36 Recessed Magnetic Door and Window Security Sensors with Wired Contacts

SONOFF Zigbee 3.0 Wireless Smart Home Sensor Hub with Temperature, Humidity, Motion, and Door/Window Sensors

SONOFF Zigbee 3.0 Wireless Bridge with Temperature, Humidity, Motion, and Door/Window Sensors

5 Pair Wired Magnetic Contact Reed Switch Sensors RC-36 for Home Security Alarm System

eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase or HomeBase E

2-YEAR BATTERY LIFE: One CR-123A battery provides monitoring for 730 days. - FOR DOORS AND WINDOWS: Small and compact design fits onto any door or window frame. - 100-DECIBEL SIREN: If a forced entry is detected, a siren as loud as a jackhammer will be tr

Smanos DS2300 Door/Window Sensor 2-Pack

Secure your home with SMANOS Door Window Sensor 2PK. Easy installation, real-time alerts & seamless integration for a safer home. Shop now for peace of mind!

Smart Door/Window Sensor | Zigbee 3.0 | Battery Included

Wireless Magnetic Sensor Door and Window Burglar Alarm - White Home Security System

Sonoff ZigBee Smart Home Gateway Bridge with Wireless Switch, Temperature and Humidity Sensor, Motion Sensor, and Wireless Door/Window Sensor

Independent Wireless Magnetic Door and Window Entry Alarm System for Home and Business

Wireless Home Security Alarm System with Standalone Magnetic Sensors for Door and Window Entry

Sonoff ZigBee Wireless Motion and Door/Window Sensor with Temperature and Humidity Monitoring

Sonoff ZigBee Wireless Motion and Door/Window Sensor with Temperature and Humidity Monitoring

Sonoff ZigBee Wireless Motion and Door/Window Sensor with Temperature and Humidity Monitoring

10-Pack Wired Magnetic Door and Window Sensor Alarm with Recessed Contacts for Home Security

10pcs Wired Magnetic Door and Window Sensor Alarm with Recessed Contacts for Home Security

Smart Wireless Door and Window Magnetic Alarm Sensor Home Security System

Wireless Door Window Magnetic Sensor Alarm 120DB Home Security Device

Tuya Smart WiFi Door and Window Open/Closed Sensor with Voice Control for Google Home and Alexa

Tuya Smart WiFi Door and Window Open/Closed Sensor with Voice Control for Google Home and Alexa

SONOFF SNZB-04 Wireless ZigBee Door/Window Sensor Security Alarm System for Smart Home with ZigBee Bridge Compatible with eWeLink and Google Home

100db High-Speed Wireless Anti-Theft Vibration Sensor Alarm for Door/Window Home Security

Wired N.C. Magnetic Door and Window Contact Sensor Alarm - 5 Pairs

SONOFF Zigbee 3.0 Smart Home Hub with Wireless Switch, Temperature and Humidity Sensor, Motion Sensor, and Wireless Door Window Sensor

WiFi Smart Door and Window Sensor with Open/Closed Detection, APP Control, Security Alarm, Alexa & Google Home Compatible

Wireless Home Door Window Security Sensor Alarm SMR88