Portable Smart 3V ZigBee Motion Sensor Up to 6m eWeLink (SNZB-03P)
Are you looking for a reliable way to improve the security and automation of your smart home? The eWeLink Portable Smart 3V ZigBee Motion Sensor Up to 6m (SKU: 068043 or SNZB-03P) is the perfect solution for you. This compact, highly responsive and energy-saving device allows you to make your home smarter, safer and more energy-efficient. With the advanced Zigbee 3.0 protocol and wide compatibility, this sensor is an indispensable part of any modern smart system.
Whether you want to automatically turn on the lights in the hallway, monitor what's happening in the garage, or receive instant alerts about unauthorized movement on your smartphone, SONOFF SNZB-03P ensures flawless operation with an extremely fast response time - in less than 5 seconds.
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Key benefits and features for a comfortable and safe home
1. Exceptional energy efficiency and long lifespan
Forget about constantly changing batteries. The sensor is powered by a powerful 3V CR2477 battery (included in the package), which, combined with the energy-saving Zigbee 3.0 protocol, ensures a battery life of up to 3 years. This means long-term operation without the need for frequent maintenance, saving you time and money.
2. Smart ambient light detection
SONOFF SNZB-03P is equipped with an intelligent ambient light detection function. When the sensor detects motion, it automatically judges whether there is enough natural light in the room. If the room is already bright, it will not turn on the light, but if it is dark, it will immediately activate the lighting. This function significantly helps to reduce electricity consumption in your household.
3. Complete security and instant notifications
The sensor works as a great security gadget. When detecting unauthorized movement, the system can immediately sound an alarm via your smart gateway (hub), activate the connected camera to record, or send you an instant push notification to your phone via the eWeLink app. This way, you can have control over your home anywhere, anytime.
4. Local operation even without Wi-Fi connection
One of the biggest advantages of the Zigbee protocol is its independence from the external internet network. Even if your home Wi-Fi connection goes down, locally configured smart scenes between Zigbee devices will continue to function smoothly. Your security and automation will remain active in all circumstances.
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Detailed technical specifications
The sensor boasts small dimensions and a neutral design made of high-quality PC plastic, making it a discreet addition to any space - from the living room to the office or warehouse.



Model / SKU:
068043 (SONOFF SNZB-03P)


Detection range:
Up to 6 meters, wide angle 110°


Wireless connectivity:
Zigbee 3.0


Battery model:
CR2477 (3V) - included


Battery life:
Up to 3 years


Operating temperature:
-10°C ~ 60°C


Operating humidity:
5 - 95% RH (non-condensing)


Housing material:
Durable PC plastic


Dimensions:
44 x 44 x 65 mm


Net weight:
54g



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Compatibility and integration into a smart home
The motion sensor works via the eWeLink app and is compatible with a wide range of smart devices and gateways. A Zigbee hub (gateway) is required for operation. It is fully compatible with the following devices and platforms:

SONOFF gateways: NSPanel Pro, iHost, ZB Bridge Pro, ZBDongle-E
Other Gateways: Echo Plus 2nd Generation
Smart platforms and voice assistants: Tuya, Smart Life, Amazon Alexa, Google Assistant (Google Home), SmartThings, Alice and IFTTT

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What do you receive in the package?

1x Portable Smart 3V ZigBee Motion Sensor (SONOFF SNZB-03P)
1x CR2477 button battery
1x Mounting kit for easy installation

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Frequently Asked Questions (FAQ)
Does the sensor require a smart gateway (Hub) to function?
Yes, because the sensor uses the Zigbee 3.0 protocol, it requires a compatible Zigbee gateway (such as SONOFF NSPanel Pro, ZB Bridge Pro or other compatible gateways) to connect to your smartphone and other devices.
How long does the battery last and is it difficult to replace?
The sensor uses a high-capacity 3V CR2477 battery, which, due to the low power consumption of the Zigbee protocol, ensures a lifespan of up to 3 years. Battery replacement is quick and easy without the use of complicated tools.
Will the sensor work if my Wi-Fi connection at home goes out?
Yes! If your smart scenes are set locally within the Zigbee network (e.g. a sensor turns on a Zigbee smart light when motion is detected), these automations will work even without an internet connection or Wi-Fi signal.


Responsible persons:
sonoff - INNPRO Robert Błędowski Sp. z o. o., Rudzka 65c, 44-200 Rybnik, Poland, contact@innpro.eu (+48) 696 323 914
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Battery installation
• Open the sensor cover and insert a 3V battery (e.g. CR2477).
• Close the lid again and check if the LED indicator flashes.
• Connection to a smart hub (gateway)
• Ensure that you have a ZigBee gateway connected to the eWeLink app
• Open the app and add a new device (select ZigBee motion sensor).
• Follow the instructions in the app to quickly connect the sensor to the system.
• Sensor installation
• Place the sensor in the desired location or attach it with adhesive tape/wall screws.
• Recommended installation height is 1.5–2.2m for optimal detection.
• After installation, test operation by moving in front of the sensor.
• Smart scenario configuration
• Set up automations in the app, such as turning on lights when motion is detected.
• Enable phone notifications for room security monitoring.

Useful tips:
💡 Place the sensor in a strategic location where it will effectively detect movement (hallways, entrances, staircases). 💡 Use multiple sensors for complete coverage of larger rooms or outdoor areas. 💡 Combine it with smart lighting and set the lights to turn on automatically when someone enters the room. 💡 Activate security notifications and receive alerts on your phone when motion is detected while you are away from home. 💡 Ensure a good connection to the gateway, as ZigBee devices work optimally in a network with a stable connection.

Warnings:
⚠️ The sensor only works with a ZigBee gateway - Not compatible with classic WiFi routers.⚠️ Do not install the sensor directly next to heat sources (radiators, sunlight), as they may affect motion detection.⚠️ Do not use outdoors without additional protection, as the sensor is not waterproof.⚠️ Check the battery status every few years and replace it in time for continuous operation.⚠️ The optimal installation is at a height of 1.5–2.2m so that the sensor detects motion correctly and without dead spots.

Same summary

The portable smart 3V ZigBee motion sensor up to 6m eWeLink makes sense for users who want reliable motion detection in their home or weekend home and are already using or planning a ZigBee central unit. Before choosing, it is good to know that this sensor requires a central unit to operate, so it is not suitable for those looking for a standalone solution without additional equipment. The ZigBee connection allows for low power consumption and reliable integration into smart homes, but it is not intended for users who want a WiFi connection and immediate use without a central unit.

Recommendation source: Enaa guides and team experiences.

User view

This type of sensor is most often used by households looking to add basic burglary protection or automation to their home, such as turning on lights when motion is detected. It is also recommended for users who use a ZigBee control panel in their existing system and want smart multi-room management or monitoring in a weekend house, basement, or other less frequently visited spaces.

Many users trust Sonoff products because they offer good compatibility with various smart home ecosystems and allow for easy system expansion as home needs change over time.

Why buy at Enaa

With Enaa, you can easily compare all smart sensors in the same category, making it easier to choose according to your needs and ecosystem. With your purchase, you also get access to informed descriptions and experiences from other users, which is useful when looking for a reliable solution for your smart home.

Answers to frequently asked questions

Does the sensor work without a ZigBee hub?

No, an appropriate ZigBee central unit is required for operation, as the sensor does not independently enable connection to smart devices or the application.

Where is the best place to install this sensor in the home?

Recommended installation is near entrances, hallways, or in rooms where you want automatic motion detection and triggering of other smart devices, but it is important that it is not exposed to direct sources of heat or moisture.

What is the motion detection range of this sensor?

The sensor detects movement at a distance of up to 6 meters, which is sufficient for most standard living spaces.

Is the sensor compatible with other smart devices from different manufacturers?

If your smart hub supports the ZigBee protocol, the sensor is usually compatible with various devices within the same standard, but we recommend checking your hub's instructions first.

How often does the battery in this sensor need to be changed?

The frequency of battery replacement depends on the load and the number of detected events, but usually the battery lasts several months to a year with typical use.

Description updated: April 2026