SONOFF SenseGuard DW Gen2 SNZB-04PR2 Zigbee Door Window Contact Sensor Open Close Monitoring Tamper Proof Phone Alert Home Security Alarm Works with Alexa Home Assistant 1Pcs

With tamper detection, the device instantly alerts you via the app and triggers smart scenes like gateway sound alarms when forced removal or damage is detected.

Working as a key sensor in your smart home ecosystem, it can trigger camera recording and sound-light alarms for security, or link with climate control devices to create a comfortable and energy-efficient home environment.

Weighing only 45.1g, the smart door/window sensor features a compact design that takes up minimal space, does not affect door or window operation, and preserves your home's overall aesthetics.

Support both horizontal and vertical mounting, easily adapting to wide gaps, narrow frames, or uneven door and window structures.

Powered by standard AAA batteries for easy replacement, lower maintenance costs, and up to 3 years of worry-free operation, it is an ideal security door sensor for long-term home protection.