Protect doors, windows and smart home entry points with the SONOFF SNZB-04PR2 Smart Door/Window Sensor, offering Zigbee connectivity, tamper alerts, flexible installation, AAA battery power, smart automation triggers and compact discreet design.
The SONOFF SNZB-04PR2 is a smart door and window sensor designed to monitor opening and closing status in a Zigbee smart home system. It is suitable for doors, windows, cabinets, drawers, balcony doors and other access points where users want instant status detection, security alerts and automation triggers.
The sensor helps improve home security by detecting when a door or window is opened. When the status changes, it can send alerts through the app and work with other smart devices to start connected actions, such as activating an alarm, switching a gateway to armed mode or triggering camera recording.
Tamper detection adds another layer of protection. If the sensor is forcibly removed, opened or damaged, the system can notify the user and trigger smart scenes. This makes the SNZB-04PR2 useful not only for everyday monitoring, but also for intrusion warning and device security.
The SONOFF SNZB-04PR2 works through Zigbee IEEE 802.15.4 and requires a compatible Zigbee hub or gateway. This low-power wireless connection is ideal for small battery-powered sensors and helps provide stable communication for smart home automation.
Flexible installation makes the sensor suitable for many different door and window structures. It supports both horizontal and vertical mounting, allowing it to adapt to wide gaps, narrow frames, uneven surfaces and installations where traditional contact sensors may be harder to place.
The sensor supports a detection range of up to 30 mm when the magnet is installed horizontally and up to 15 mm when installed vertically. This gives more freedom during installation and helps the device fit a wider range of door and window designs.
With its slim and lightweight design, the SNZB-04PR2 can be installed discreetly without affecting the normal use of doors or windows. The transmitter measures 90 x 26 x 13.5 mm, while the magnet measures 31 x 14 x 6.5 mm, making the set compact enough for most home interiors.
The device is powered by two standard LR03 AAA batteries. This makes replacement easy and cost-effective, without requiring special battery formats. The long battery life helps reduce maintenance and supports reliable long-term use in home security and automation systems.
The SNZB-04PR2 can also be used for energy-saving automation. For example, if a window remains open for a set time, a connected thermostat or climate device can be turned off automatically. This helps reduce unnecessary energy use while keeping indoor comfort under better control.
Smart scenes make the sensor useful beyond basic security. Door and window status can be used to control lights, climate devices, alarms, cameras and other connected equipment. This allows users to create practical automation routines for everyday comfort, safety and energy management.
The sensor can also work with voice and third-party smart home platforms through compatible integrations. When added to the eWeLink app and synchronized through supported cloud-to-cloud or bridge solutions, users can check sensor status and include it in a wider connected home environment.
The SONOFF SNZB-04PR2 can be integrated with Apple Home through a Matter Bridge, such as compatible SONOFF bridge solutions. It can also be used with open-source smart home platforms, including Home Assistant, when paired with suitable SONOFF Zigbee dongle or gateway hardware.
The casing is made from PC material, and the sensor is designed for indoor operation in temperatures from -10 °C to 60 °C. It supports working humidity from 5% to 95% RH without condensation, making it suitable for normal home environments.
The SONOFF SNZB-04PR2 is a practical smart contact sensor for users who want better awareness of doors, windows and other access points. With Zigbee connectivity, tamper alerts, flexible mounting, AAA battery power, smart scene support and a compact design, it helps make home security and automation more responsive, efficient and convenient.
Main features
Smart door and window sensor for opening and closing detection
Zigbee IEEE 802.15.4 wireless connectivity
Tamper detection with instant app alerts
Smart scene triggers for security, lighting and climate automation
Flexible horizontal and vertical installation
Detection range up to 30 mm with horizontal magnet mounting
Compact and discreet design for doors, windows and cabinets
Powered by two standard AAA batteries
Works with compatible SONOFF Zigbee hubs and Matter Bridge solutions
Supports integration with Apple Home and open-source platforms via compatible bridges
Suitable for energy-saving automation with thermostats and connected devices
Wide working temperature range from -10 °C to 60 °C
The SONOFF SNZB-04PR2 is a compact Zigbee smart door and window sensor for home security, automation and energy-saving control. With tamper alerts, flexible mounting, AAA battery operation, smart scene support and compatibility with suitable SONOFF Zigbee and Matter Bridge ecosystems, it is ideal for monitoring doors, windows, cabinets and other important access points.