SHELLY-DW2 Door / Window 2 WiFi Sensor - Absolute Automation USA
RENOGY Door & Window Sensor - Renogy United States
Door & Window Sensors at Lowes.com
Door/Window Sensor - Space Smart Solutions
Smart Door/ Window Sensor
Amazon.com: WiFi Door Sensor, Tuya Smart Door Window Sensor, Smart Window Sensor Real-time Alarm Compatible with Alexa Google Assistant,Home Security Door Open Contact Sensor for Business Burglar Alert (1 Pack) : Electronics
Door and Window Alarm Sensor for Home Security | Ooma
Aqara Door and Window Sensor, Requires AQARA HUB, Zigbee Connection, Wireless Mini Contact Sensor for Alarm System and Smart Home Automation, Compatible with Apple HomeKit, Alexa, Works with IFTTT - - Amazon.com
Philio Door Window Alarm Sensor for a Safer Home | Shop Ezlo