SONOFF SNZB-04 – Zigbee Wireless door/window sensor


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【Sync Status & History Records Check】Sync the opening & closing status of door/window. With 3-month history records check, help you master your home security clearly.
【Smart Scenes, Work With WiFi Devices】Simply connect the sensor with your devices, turn on/off the lights when you open/close the door.
【Voice Control & Camera Binding】Want to check your door/window close or not? Just ask your Alexa/ Google Assistant instead of opening your phone. You can also add a camera to the sensor to scare the stranger off with your voice.
【Easy Installation & Low-battery Notification】Using 3M adhesive to easily mount the sensor at your ideal locations. Replace the battery in time with a notification when the battery life is 10% remaining.
【Note】Zigbee Bridge and batteries are required. Keep a distance of less than 80M between SNZB-04 and Zigbee Bridge (open space).

Frequently Bought Together
SONOFF Zigbee Smart Plug| iPlug Series S40 Lite
Plug Type
SONOFF SwitchMan Smart Wall Switch-M5
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Scene Linkage, Start Your Smarter Life

Have you ever thought to turn on/off home appliance through you action? Simply connect the sensor with your home appliance and you can make devices on/off when you open or close the door.Just Like A Police Is Patrolling Your Home

Worry that your home is threatened when you’re away? Try to connect a camera to the sensor and you can scare the stranger off with your voice anywhere, anytime.

History Records Check

Want to check the past message notification of your home? The motion sensor allows you to go back to the history records over past 3 months.
Intelligent Security, Simple Installation

Simply use our included 3M adhesives to get the motion sensor mounted in your ideal locations just in seconds.

Low-battery Notification

You will get a notification of low-battery level when the battery life gets 10% remaining.

SONOFF SNZB-04 Zigbee Smart Door Window Sensor Mini Door Alarm Sensor Work With SONOFF Zigbee Bridge Pro For Smart Home Security

Note 1: SNZB04 must be used with Zigbee Bridge.

The wireless door/window sensor is essential for knowing who is coming in and out of your home, so it is most often used as part of smart security system.

SONOFF SNZB-04 is a Zigbee two-in-one wireless door/window sensor that can be put on your door or window to tell you with an alert notification if your door or window is opened or closed, adding an extra layer of security to your home. The sensor provides you the possibility to create a scene linkage of Zigbee and Wi-Fi devices. Both the opening and closing status of the door/window are synced on your mobile phone, no longer to think back whether the door/down is off or not. It is really useful and can help you turn on or off the light in the action. Works with SONOFF Zigbee Bridge Pro in harmony, you can set a scene to get your hallway lighted immediately when the door is opened.

The camera function can be enabled on the sensor page in the eWeLink APP, which also allows you to view clearly who enters your home; even you can frighten the stranger and ask him to leave your home immediately with the two-way audio function. Its application can also extend to wide areas like drawers, garage doors, blinds, etc. Just stick it anywhere two things connect and it is always safe even if you don’t keep watch on it. Share the sensor with your family to give them an ability to quickly control and monitor your home together. Simple installation for easier setup. Peel and directly stick it on the targeted place or object, a smart security system is ready for you.



Additional information

Weight 26 g
Dimensions 45 × 19 × 49 mm

Product Type

ZigBee Wireless door/window sensor



Wireless connection





Magnet: 32X15.6X13mm;
Sensor: 47X27X13.5mm

Certified Compliance


Works With


Customer Reviews

Based on 30 reviews
good door contact sensor

this door contact sensor is good overall, but would like its design can be much smaller, like some other brands. Which can be installed in any place of door, the product is only a tiny little chip board and button cell battery. and a small magnetic.

Reason: smaller, smart, discreet, can be installed hidden inside door edge for not obviously seen.

Also would like to Ewelink app can display both time and date of action, currently only showing time of action, such as

Opened 10:38:22 yesterday
Closed 21:35:02 today.
Opened 16:29:15 2023-11-17

use "today" for current day, "yesterday", or above for example

in this way, most app user don't have to check this door is open or close at which date.

Fedele Casini
Good product

Assembled and working, no problems

Produit super bien

Les résultats de ce produit sont très satisfaisante, il est super bien. J'encourage les gens à le commander pour rendre leur maisons smart.

Daniil Mira
Works good, hard to setup

It takes many tries to get it paired/connected to the system and battery holder is just bad. Range is also really small. But after proper setup, no problems encountered.

Could you please tell us the problem when you pair the device?
And what's the problem with the battery holder, please tell us more details, so we can improve our devices in the future. Thanks much for your advice.

Michael Sandall
Great product

Easy to set up and use.

Ezequiel Buttiero
Great device!

It's a great divide easy to set up, it just took a minute to added it to the iHost. The updates arrives in less than 1 second which is great!

Robert Nystrom
Sonoff Window / Door Sensor

I only have a couple window / door sensor but they work without fail

Gerardo Memije
Like it many options to do, lots softwares

Like it, automation is a world, have fun

Peter Pulfer
Works as expected.

Perfekt integration into my Home Assistant installation

Good sensors

I started with a couple of this sensors and are working good. They are connected to a Zigbee 3.0.

One sensor was having some errors, I removed it, paired it again and the issue was fixed

SONOFF SNZB-04 - Zigbee Wireless door/window sensor