Run Zigbee & Thread Together Without Compromising Your Smart Home Setup

Build a more flexible smart home network with the SMLIGHT SLZB-MR4U USB Zigbee & Thread Adapter, a premium dual-radio coordinator designed for Zigbee 3.0, Thread, Matter-over-Thread, Home Assistant, Zigbee2MQTT and ZHA.

With dedicated Texas Instruments CC2674P10 and Silicon Labs EFR32MG26 radio chips, the MR4U can operate Zigbee and Thread simultaneously on separate radios. This makes it easier to expand an existing Zigbee installation while adding newer Matter-over-Thread devices.

✔ Dedicated Zigbee & Thread Radios
✔ CC2674P10 + EFR32MG26 Chipset
✔ Simultaneous Zigbee & Thread Operation
✔ Ethernet, Wi-Fi, USB-C & PoE Connectivity
✔ USB-over-Ethernet Passthrough
✔ Home Assistant, ZHA & Zigbee2MQTT Compatible

Built for Home Assistant users, smart home enthusiasts, installers, developers and advanced automation systems that need flexible network placement and support for multiple wireless protocols.

Built for Flexible Smart Home Networks

Smart home installations often start with one wireless protocol and gradually become more complex.

A Zigbee-only USB coordinator may be enough for a basic installation, but expanding into Matter and Thread can introduce the need for additional hardware or separate radio solutions.

The SLZB-MR4U is designed to solve that problem with two independent radio platforms. One radio can handle Zigbee while the other handles Thread, allowing both networks to operate at the same time rather than switching between protocols.

Its Ethernet-first design also lets you position the coordinator where your wireless network needs it instead of keeping it directly beside your Home Assistant server. With PoE, USB-C, Wi-Fi and Ethernet connectivity, the MR4U gives you more installation flexibility for residential and advanced smart home environments.

Why Choose the SMLIGHT SLZB-MR4U?

Choosing a Zigbee coordinator or Thread border router is about more than simply adding another USB adapter. Network placement, protocol support, firmware flexibility and future expansion all matter.

The SLZB-MR4U combines:

Dedicated CC2674P10 Zigbee radio for Zigbee 3.0 networks

EFR32MG26 Thread radio for Thread and Matter-over-Thread applications

Simultaneous dual-radio operation for independent Zigbee and Thread networks

Ethernet and PoE connectivity for flexible remote installation

USB-over-Ethernet passthrough for compatible USB devices

SLZB-OS firmware with web configuration, OTA updates, diagnostics and advanced networking features

Every major feature is designed around one goal: giving your smart home infrastructure more flexibility without forcing Zigbee and Thread onto the same radio.

Why the SLZB-MR4U Compared to Standard USB Coordinators

The MR4U is designed for users who need more than a basic USB Zigbee dongle and want a more flexible Zigbee and Thread coordinator for an expanding smart home system.

The Difference You Notice Immediately

Connect Zigbee & Thread at the Same Time

The two independent radio chips allow Zigbee and Thread networks to operate concurrently on separate radios. This is one of the MR4U's biggest advantages over single-radio solutions.

Position Your Coordinator Where It Matters

Ethernet allows the SLZB-MR4U to operate away from the main Home Assistant server. This can make it easier to place the coordinator in a more suitable location for your wireless network.

Simplify PoE Installation

With 802.3af PoE, compatible network infrastructure can provide power and network connectivity through one Ethernet cable, helping create a cleaner installation.

Add Matter-over-Thread Capability

The EFR32MG26 radio provides a dedicated platform for Thread and Matter-over-Thread applications, allowing users to expand beyond traditional Zigbee devices.

Access Compatible USB Devices Over the Network

USB passthrough allows compatible USB devices to be connected to the MR4U and exposed over the network, providing additional flexibility for advanced installations.

Premium Features

The MR4U also includes 6 status LEDs, a multifunction button and a compact 160 × 24 × 28 mm housing designed for flexible installation.

How to Use the SLZB-MR4U

Using the SLZB-MR4U involves configuring the radios and connecting the adapter to your smart home network.

1. Connect the Adapter

Connect the MR4U using Ethernet with PoE, Ethernet with USB-C power, or another supported connection method.

2. Open the Web Interface

Access the SLZB-OS web interface to configure the device and manage its available functions.

3. Configure Zigbee

Use the CC2674P10 radio as a Zigbee coordinator or router with compatible software such as Zigbee2MQTT or ZHA.

4. Configure Thread

Configure the EFR32MG26 radio for Thread and Matter-over-Thread applications using the supported OpenThread Border Router setup.

5. Connect Your Devices

Pair compatible Zigbee devices with your Zigbee network and commission compatible Matter-over-Thread devices through your chosen smart home platform.

6. Manage the System

Use SLZB-OS for configuration, diagnostics and supported OTA firmware updates without requiring a separate flashing cable.

Who Is It For?

The SMLIGHT SLZB-MR4U is ideal for:

Home Assistant users

Users building advanced Home Assistant installations with Zigbee and Thread devices.

Smart home enthusiasts

People who want to combine existing Zigbee devices with newer Thread and Matter products.

Zigbee2MQTT users

Users looking for a network-connected Zigbee coordinator rather than a basic USB stick.

ZHA users

Home Assistant users who prefer ZHA for managing their Zigbee network.

Matter & Thread adopters

Users introducing Matter-over-Thread devices into an existing smart home.

DIY automation builders

Developers and hobbyists who want greater control over their smart home hardware and firmware.

Professional installers

Installers who need flexible Ethernet and PoE deployment for larger or distributed smart home systems.

If your smart home is moving beyond a single wireless protocol, the MR4U provides a practical platform for managing Zigbee and Thread simultaneously.

Delivery Information

Please refer to the product listing for current availability, delivery time and shipping information.

The SLZB-MR4U is supplied pre-flashed with SLZB-OS, allowing configuration through its web interface without requiring a separate flashing cable.

Warranty

Warranty coverage is subject to the manufacturer and retailer's applicable warranty terms and conditions.

For warranty or compatibility questions, retain your purchase information and contact the retailer before attempting hardware modifications.

Specifications

The CC2674P10 and EFR32MG26 are dedicated radio platforms, allowing the MR4U to run Zigbee and Thread concurrently instead of depending on a single multiprotocol radio.

Frequently Asked Questions

Can the SLZB-MR4U run Zigbee and Thread at the same time?

Yes. The MR4U uses two independent radio chips, allowing Zigbee and Thread to operate simultaneously on separate radios.

Which Zigbee software does it support?

The MR4U is designed to work with popular Home Assistant Zigbee platforms including Zigbee2MQTT and ZHA.

Does it support Matter?

Yes. The EFR32MG26 radio can be used for Thread and Matter-over-Thread applications.

Can I connect it through Ethernet?

Yes. Ethernet is a primary connection method, allowing the coordinator to be positioned away from the computer or Home Assistant server.

Does the SLZB-MR4U support PoE?

Yes. It supports IEEE 802.3af PoE, allowing compatible Ethernet infrastructure to provide both network connectivity and power.

Can I use USB-C instead of PoE?

Yes. USB-C is supported as an alternative power/connection method. The MR4U is designed so PoE and USB-C can coexist through its isolated power design.

Can I use USB devices through the MR4U?

Yes. Its USB-over-Ethernet passthrough feature supports compatible USB devices, allowing them to be accessed through the network.

Does it come with firmware installed?

Yes. The device ships pre-flashed with SLZB-OS, providing web-based configuration and supported OTA firmware management.

Can I use the MR4U remotely?

The Ethernet architecture allows the coordinator to be installed away from the Home Assistant server. SLZB-OS also includes networking features such as WireGuard support for suitable remote configurations.

Is the MR4U suitable for a basic Zigbee setup?

It can be used for a Zigbee installation, but its dual-radio architecture is most valuable when you also need Thread/Matter support, remote Ethernet deployment or USB passthrough. If you only need a simple Zigbee coordinator, a single-radio model may be more economical.

Build a More Flexible Smart Home Network

Whether you're expanding an existing Zigbee network, introducing Matter-over-Thread, upgrading a Home Assistant installation, or building a more advanced automation system, the SMLIGHT SLZB-MR4U USB Zigbee & Thread Adapter gives you a flexible foundation.

With dedicated CC2674P10 and EFR32MG26 radios, simultaneous Zigbee and Thread operation, Ethernet, PoE, USB-C, USB-over-Ethernet and SLZB-OS, the MR4U is built for smart home users who want more control over how their wireless infrastructure is deployed.

Upgrade your smart home network with dedicated Zigbee and Thread connectivity in one flexible, network-ready adapter.