Sonoff Zigbee Door/Window Sensor SNZB-04PR2

he SONOFF SNZB-04PR2 (SenseGuard DW Gen2) is the upgraded next-generation door and window sensor, redesigned with a slimmer profile and powered by standard AAA batteries. Utilizing the Zigbee 3.0 protocol, it seamlessly integrates with major smart home platforms, including Home Assistant (via ZHA or Zigbee2MQTT), Sonoff eWeLink ecosystems, and Amazon Echo devices with built-in Zigbee hubs. Equipped with active anti-tamper detection, the sensor immediately alerts your smartphone if someone attempts to remove, open, or disturb the unit. Moving away from hard-to-find coin cells, the SNZB-04PR2 uses two readily available AAA batteries for reliable, multi-year battery life and hassle-free replacements. Its slimmed-down casing sits flush against door and window frames while supporting flexible installation gaps. Use real-time open/close triggers to automate lighting, control climate schedules, or sound security alarms upon unauthorized entry. Thanks to Zigbee’s local automation capabilities, linked local scenes execute instantly with ultra-low latency—even if your home internet or Wi-Fi connection goes down. Key Features: Door & Window Monitoring: Instantly track open/close status to trigger smart lights, HVAC rules, or security alerts upon entry. Active Tamper Alerts: Built-in tamper switch triggers an instant app notification if the sensor is disturbed or removed from its mount. Convenient AAA Battery Power: Powered by standard, easily replaceable AAA batteries, delivering years of dependable performance without specialized coin cells. Slim Gen2 Design: An elongated, lower-profile housing allows for a more flush, discreet installation on modern door and window frames. Zigbee 3.0 Compatibility: Connects directly to compatible Zigbee hubs including SONOFF iHost, ZBBridge Pro, ZBDongle-E/P, Home Assistant (ZHA / Zigbee2MQTT), and Zigbee-enabled Echo devices. Local Smart Scenes: Executes automated scene linkage locally across your Zigbee network without internet dependency. Note: A compatible Zigbee 3.0 gateway/coordinator (such as the SONOFF ZBBridge series, SONOFF ZBDongle, or compatible smart hub) is required for operation.