This sensor consists of two parts: a main sensor body and a magnetic contact. When the magnetic field is broken—such as when a door or window opens—the sensor sends a Zigbee signal to a connected hub. It supports local smart scenes, meaning automations can still function even if the internet is down (when paired with a hub like the Zigbee Bridge Pro or iHost).
The SNZB-04P includes a tamper alert feature, which notifies users if someone tries to remove or tamper with the device. It’s powered by a CR2032 coin cell battery, offering ultra-low power consumption and long-lasting performance.
Installation is simple with adhesive backing, and its compact white design blends seamlessly into most interiors.
Key Features
- Zigbee 3.0 protocol for fast, stable connectivity
- Sends real-time alerts when doors/windows are opened or closed
- Supports local smart scenes via compatible Zigbee hubs
- Tamper alert for added security
- Compatible with Sonoff Zigbee Bridge Pro, NSPanel Pro, iHost, and SmartThings
- Battery-powered (CR2032 coin cell, 5+ years life)
- Compact and easy to install
- Ideal for home security, automation, and energy-saving scenes
Technical Specifications
- Model: Sonoff SNZB-04P
- Protocol: Zigbee 3.0
- Detection Method: Magnetic contact sensor
- Battery Life: Over 5 years
- Tamper Alert: Yes
- Power Supply: CR2032 coin cell battery
- Compatibility: Sonoff Zigbee hubs, SmartThings
- App Support: eWeLink
- Dimensions: Approx. 47 mm × 27 mm × 13.5 mm
- Application: Door/window intrusion detection
- Colour: White





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