Ring Alarm Contact Sensor 2-Pack - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design | Easy Installation | Base

Ring Alarm Contact Sensor 6-Pack - 2nd Gen | Monitor 6 Doors Or Windows | Instant Alerts | Approximately 3-Year Battery Life | Slim Design | Easy

Window And Door Alarm When Opened (5 Pack) For Kids Safety/Home Security, Sliding Front Door Opening Sensor Alarms For Dementia, 120Db Burglar Alert,

Aqara - T1 Door And Window Sensor- Requires Hub Product, Supports Apple Homekit, Alexa, Google, Smartthings - White

Ring Alarm Contact Sensor - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design Fits Any Frame | Easy

Eufy Security Entry Sensor, Detects Opened And Closed Doors Or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use