Dongles · Head to head

Smlight SLZB-07 MG24 vs Sonoff Dongle Plus MG24

Full Smart Dongles comparison in 2026

Updated October 2026
Data from Amazon and official Smlight and Sonoff sites.
2026 verdict
Between two EFR32MG24 USB sticks, the Sonoff Dongle Plus MG24 is the better buy, with a higher listed antenna gain and a lower price than the Smlight SLZB-07 MG24.
Sonoff Dongle Plus MG24
Winner
Sonoff Dongle Plus MG24
$35.90

Last recorded price

Buy on Amazon USA
Under the plastic they match: Zigbee 3.0 as coordinator and router, +20dBm of amplifier gain, a Thread border router and Home Assistant and Zigbee2MQTT support. The Sonoff Dongle Plus MG24 lists a +4.5dBi antenna against +3dB and owners say Home Assistant recognizes it with no flashing. The Smlight SLZB-07 MG24 counters with a body of just 14g and painless migration from older dongles, but its outdated shipping firmware needs a flash first. Pick the Sonoff Dongle Plus MG24 for the easy start, and the Smlight SLZB-07 MG24 if the smallest possible stick matters to you.
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FeatureSmlight SLZB-07 MG24Sonoff Dongle Plus MG24Winner
Price$45.99$35.90Sonoff Dongle Plus MG24
Rating3.54.7Sonoff Dongle Plus MG24
Antenna Gain+3dB+4.5dBiSonoff Dongle Plus MG24
Warranty1 year1 yearTie
PowerUSBUSBTie
ConnectivityUSBUSBTie
Zigbee Chip ModelEFR32MG24EFR32MG24Tie
Zigbee RouterYESYESTie
Z-Wave ControllerNONOTie
Thread Border RouterYESYESTie
Matter BridgeNONOTie
Transmit Power+20dBm+20dBmTie

What the differences mean

First-day setup

The Sonoff Dongle Plus MG24 is recognized by Home Assistant with no flashing, while the Smlight SLZB-07 MG24 ships with outdated firmware that has to be updated before use. That is a small task for a technical user and a real hurdle for a beginner.

Antenna

The Sonoff Dongle Plus MG24 lists +4.5dBi and the Smlight SLZB-07 MG24 +3dB (different units), with the same +20dBm of amplifier gain. It is a modest edge for the Sonoff, and its antenna is fixed, so your only tool against interference is the extension cable in the box.

Router role

Both list the Zigbee router role along with the coordinator, so either can extend the mesh.

Size

The Smlight SLZB-07 MG24 is listed at 14g and 54 mm long. The Sonoff Dongle Plus MG24 is 214 mm long with no weight listed, so it is the longer stick, though owners still call it compact.

Which one to buy if

What owners say

Owners of both sticks report the same end state: a Zigbee network with dozens of devices that stays up under Home Assistant, ZHA or Zigbee2MQTT. Sonoff Dongle Plus MG24 owners talk about a plug-and-play start with no flashing, a compact, cool-running body, a USB extension cable in the box and range that reaches through thick walls. Their complaints are a permanently fixed antenna, no mounting point and a COM-port workaround on Hyper-V. Smlight SLZB-07 MG24 owners talk about its tiny size and about moving 50-plus devices from an older stick with the Migrate Adapter tool without re-pairing, but say it ships with outdated firmware, that flashing the Thread firmware can go wrong and that the documentation is scarce.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Smlight SLZB-07 MG24
  • Sonoff Dongle Plus MG24

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Frequently Asked Questions

Which is better overall: Smlight SLZB-07 MG24 or Sonoff Dongle Plus MG24?

The Sonoff Dongle Plus MG24. It has the stronger antenna, is the more affordable and needs no firmware flash. The Smlight SLZB-07 MG24 is the smaller stick.

What is the biggest difference between the Smlight SLZB-07 MG24 and the Sonoff Dongle Plus MG24?

The out-of-box experience. Both use the same EFR32MG24 chip, Zigbee 3.0 and +20dBm, but the Sonoff Dongle Plus MG24 works on plug-in while the Smlight SLZB-07 MG24 arrives with old firmware to update.

Can the Smlight SLZB-07 MG24 and the Sonoff Dongle Plus MG24 be Thread border routers?

Yes, both are listed as Thread border routers for Matter devices, after flashing the right firmware. Neither runs Zigbee and Thread together as a dual network radio.

Do the Smlight SLZB-07 MG24 and the Sonoff Dongle Plus MG24 work with Zigbee2MQTT?

Yes. Both are listed as supporting Home Assistant and Zigbee2MQTT, over USB only.

Who should buy the Sonoff Dongle Plus MG24?

Home Assistant users who want a hassle-free USB coordinator with a stronger antenna, an extension cable in the box and no flashing to start.

Who should buy the Smlight SLZB-07 MG24?

Users who want the smallest coordinator stick, are migrating from an older dongle and are comfortable updating firmware themselves.

Full comparison table

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