Sonoff SNZB-04PR2 Zigbee 3.0 – Smart Door and Window Contact Sensor, Real-Time Notifications and Advanced Automations

The Sonoff SNZB-04P (Pro/R2 series) is the new generation of wireless contact sensors, designed to provide enhanced protection and automation for your home. Based on the Zigbee 3.0 protocol, this compact sensor instantly detects when doors, windows, cupboards or drawers are opened or closed. Compared to previous models, the SNZB-04P features a more robust design, an improved range and a battery life of up to 5 years, making it the cornerstone of any smart security system.

Key Benefits

• Zigbee 3.0 Technology: Provides a stable, fast and secure connection with extremely low power consumption. Requires a Zigbee hub (such as the Sonoff ZBBridge Pro, iHost or NSPanel Pro) to operate.

• Long Battery Life: Optimised energy efficiency allows the sensor to operate for up to 5 years on a single battery (CR2477), eliminating the need for frequent maintenance.

• Instant Alerts on Your Phone: You’ll receive real-time push notifications on your smartphone via the eWeLink app the moment a door or window is unexpectedly opened, wherever you are.

• Smart Control Scenarios: It can be used as a trigger for other devices. For example, you can set the hallway lights to turn on automatically when you open the front door, or the air conditioning to switch off if a window remains open for more than 1 minute.

• Versatile and Discreet Installation: The minimalist design and self-adhesive backing (3M) allow for quick mounting on any surface, from garage doors to safes or fridge doors.

• Event History: The app keeps a detailed log of all activations over the last 3 months, allowing you to monitor the times you’ve accessed your home or office.

Examples of Use

1. Entry Security: Trigger a smart alarm or activate CCTV recording as soon as the front door is forced open or opened whilst you are away.

2. Energy Saving: Synchronise the sensor with a smart thermostat to turn off the heating in a room when a window is opened for ventilation.

3. Child Safety: Receive an immediate alert if your child tries to open a cupboard containing hazardous substances or the stairwell gate.

Technical Specifications

• Model: SNZB-04P (R2)

• Wireless Protocol: Zigbee 3.0 (IEEE 802.15.4)

• Detection Distance: < 20 mm (maximum distance between magnet and sensor)

• Battery: 1 x CR2477 (3V) – included

• Battery life: Up to 5 years (depending on usage)

• Housing Material: PC V0 (flame-retardant)

• Dimensions: Sensor (47.9 x 28 x 18.4 mm) / Magnet (32 x 15.6 x 13 mm)

• Operating temperature: -10°C to +40°C

Package contents: 1 x SNZB-04P contact sensor, 1 x magnet, 3M adhesive tape, quick start guide.

Why choose the Sonoff SNZB-04PR2?

It is one of the most reliable contact sensors on the market, offering the perfect balance between price, performance and longevity. Its ‘set and forget’ installation and native integration into the Zigbee ecosystem make it the logical choice for anyone wishing to transform their home into a safer and smarter space.