The SONOFF SNZB-04P is an upgraded Zigbee 3.0-based door and window sensor, delivering enhanced performance, robust security, and seamless automation for your smart home. Whether you're looking to automate lighting, receive instant intrusion alerts, or set customized smart scenes, this compact sensor is your home's first line of defense and convenience.
Built with tamper detection, you’ll be instantly notified via the eWeLink app if someone attempts to remove or tamper with the sensor. And thanks to the customizable "door open duration" alerts, you’ll be alerted if a door is left open longer than usual — perfect for energy saving and security.
With ultra-low power consumption, the CR2477 battery ensures a 5-year battery life, giving you long-lasting, worry-free operation. Even in the event of internet loss, SNZB-04P leverages Zigbee local scenes, so automation continues to function reliably.
The sensor integrates effortlessly with SONOFF Zigbee hubs (NSPanel Pro, ZB Bridge Pro, iHost, ZBDongle-E/P) as well as third-party platforms like Home Assistant (ZHA / Zigbee2MQTT), Alexa, Google Home, SmartThings, Alice, and IFTTT.
Its 20mm detection range, wide temperature tolerance (-10°C to 60°C), and tamper-proof build make it suitable for installation on any door, window, cabinet, or drawer, turning them all into smart entry points for your home.
Key Features & Benefits:
✅ Real-Time Door & Window Monitoring
Get immediate notifications when doors/windows open or close.
✅ Tamper-Proof Security
Stay protected with automatic alerts if the sensor is removed or tampered with.
✅ Zigbee 3.0 Compatibility
Connects to all major Zigbee 3.0 hubs: NSPanel Pro, iHost, ZBDongle-E, ZB Bridge Pro, Echo Plus, etc.
✅ Custom Duration Alert
Set a time threshold and get notified if a door remains open for too long.
✅ Ultra Long Battery Life
Powered by a CR2477 battery, offering up to 5 years of reliable use.
✅ Smart Automation Support
Easily link with other smart devices for advanced scenes, such as turning on hallway lights when the door opens.
✅ Works Even Without Internet
Local scene execution via Zigbee protocol ensures uninterrupted automation during Wi-Fi outages.
✅ Voice Assistant Ready
Supports Alexa, Google Home, SmartThings, and more for convenient voice control and routines.
✅ Home Assistant Integration
Add to Home Assistant via ZHA or Zigbee2MQTT for full local control and customization.
Specifications:
| Feature | Details |
|---|---|
| Model | SONOFF SNZB-04P |
| Wireless Protocol | Zigbee 3.0 |
| Installation Distance | ≤ 20mm |
| Battery Model | CR2477 (3V) |
| Battery Life | Up to 5 years |
| Working Temperature | -10°C to 60°C |
| Working Humidity | 5–95%RH, non-condensing |
| Tamper Alert | Yes |
| Product Dimensions | Transmitter: 50.5x32x21.9mm, Magnet: 27x12x12.4mm |
| Material | PC |
| Compatibility | All Zigbee 3.0 Hubs, Alexa, Google, HA |
| App | eWeLink |
What’s in the Package?
📦 1x SNZB-04P Door/Window Sensor
📦 1x Magnet
📦 1x CR2477 Battery (Pre-installed)
📦 1x 3M Adhesive
📦 1x Quick Start Guide
