Home security sensor that sends smartphone alerts and links door events to automations, the SONOFF SNZB-04P Zigbee Door Window Sensor suits simple entry monitoring. Peace of mind for anyone wanting instant notifications and the option to trigger lights or audible alarms when a door opens. Will integration with existing Zigbee hubs and long battery life fit into a busy household?
⚡ At a Glance
- • Detection Sensitivity: Responsive magnetic contact reports open and close events quickly
- • Best for: Homeowners and renters wanting simple entry monitoring with app alerts
- • Not ideal for: Set-ups that do not include any Zigbee hub or bridge
Magnetic contact sensing records door and window changes and triggers alerts. Tamper notifications notify the homeowner when the unit is interfered with.
Instant alerts and automation - with Zigbee 3.0 compatibility
Zigbee 3.0 integration enables rapid discovery by supported hubs such as SONOFF NSPanel Pro, SONOFF iHost, SONOFF ZB Bridge Pro, SONOFF ZBDongle-E and Echo Plus (2nd gen). Local Smart Scene capability allows scene linkage between Zigbee devices to run when devices remain powered even if the wider network is offline.
Immediate smartphone notifications arrive when doors open, while automations can turn on lights or trigger alarms without relying on cloud services. Quick discovery and local scenes keep routine automations responsive.
Long battery life - thanks to CR2477 battery
A CR2477 battery is supplied and is designed to extend operational life to over five years under normal usage patterns. Low-power Zigbee communication helps conserve energy between state changes.
Rare battery changes reduce maintenance for busy households and make the sensor suitable for hard-to-reach doors or windows. Peace of mind comes from not having to replace batteries frequently.
Tamper notifications and robust build - with tamper-proof design
A tamper alert mechanism triggers an app notification if the sensor is interfered with, providing an additional security layer. User feedback highlights a durable plastic housing that stands up to everyday knocks.
Immediate warnings help detect unauthorised attempts to disable the sensor, while a sturdy enclosure keeps the unit reliable in normal domestic use. Suitable for main entry points where security visibility matters.
✨ The 4 Key Reasons for SONOFF SNZB-04P Zigbee Door Window Sensor
- Zigbee 3.0 compatibility - Enables fast hub discovery and reliable local automations
- Local Smart Scene - Keeps scene linkage functioning even without network access
- Tamper alert - Sends phone notifications when the unit is interfered with
- CR2477 battery included - Designed to last over five years, reducing maintenance
📋 Technical Details at a Glance
- Product Type: Zigbee door/window sensor
- Brand: SONOFF
- Model: SNZB-04P
- Connectivity: Zigbee 3.0
- Compatibility: SONOFF NSPanel Pro, SONOFF iHost, SONOFF ZB Bridge Pro, SONOFF ZBDongle-E, Echo Plus (2nd gen)
❓ Frequently Asked Questions
Q: Do I need a hub to use the sensor?
A: Yes. The SNZB-04P requires a Zigbee hub or bridge to operate and to send app notifications.
Q: How long does the battery last?
A: A CR2477 battery is supplied and is stated to extend battery life to over five years under typical usage.
Q: Will it work with Alexa or Google Home?
A: Compatibility with Alexa and Google Home is supported when the sensor is used with a compatible Zigbee hub or bridge.
🏆 Our Verdict
Ideal for homeowners and renters who already use Zigbee hubs and want low-maintenance entry monitoring. The combination of instant smartphone alerts, tamper notifications and claimed five-year battery life makes it a practical security add-on. Long-term value comes from reduced upkeep and reliable local automations rather than frequent replacements.
