SONOFF SenseGuard DW Gen2 Zigbee Door Sensor, Open/Close Monitoring, Door & Window Alarm for Home Security, Phone Alert, Tamper Alert, Home Automation, Works with Home Assistant & Alexa, 4-pack

Accurate Open/Close Monitoring & AAA Battery Powered: The sensor requires a Zigbee hub to operate. You can monitor door or window open/close status via App and receive instant phone alerts. Powered by replaceable AAA batteries for long-lasting, stable performance.
Tamper Alert & Instant Phone Notification: Built-in tamper-prevent button allows you to receive real-time phone alerts when the device is removed, enhancing door security.
Smart Automation for Home Security and more: The sensor requires a Zigbee hub to operate. When the open/close/tamper status changes, it can trigger smart scenes such as alarms when open, camera recording, smart lights on, or voice notifications. Perfect for home security, child safety, pet monitoring, and energy-saving automation.