SONOFF SenseGuard DW Gen2 Zigbee Smart Door/Window Sensor | SNZB-04PR2

Know instantly when a door or window opens — and turn that information into smart automations. The SONOFF SenseGuard DW Gen2 (SNZB-04PR2) is a compact Zigbee contact sensor with tamper detection, flexible installation, instant alerts, and up to 3 years of battery life, designed for both home security and everyday automation.

Instant Open & Close Detection: Monitor the status of doors, windows, cabinets, drawers, safes, or other openings in real time. Receive notifications through the eWeLink app and use open/close status to trigger other smart devices.

Built-In Tamper Detection: The SenseGuard DW Gen2 can detect when someone attempts to remove or tamper with the sensor. When triggered, it can send an instant app notification or activate a smart scene, such as sounding an alarm or starting camera recording.

Flexible Installation: Designed to work with more door and window configurations, the magnet can be installed horizontally or vertically. It supports a detection distance of up to 30mm with horizontal installation and 15mm vertically, making it easier to install on wide gaps or uneven frames.

Smart Security & Automation: Use the sensor as a trigger for your smart home. Automatically turn on lights when a door opens, trigger an alarm, start camera recording, or turn off your thermostat when a window is left open. It can also integrate with Home Assistant and other compatible smart home platforms.

Up to 3-Year Battery Life: Powered by 2 standard AAA batteries, the sensor offers up to 3 years of battery life while making replacements simple and inexpensive.