Smlight SLZB-MR3 vs Sonoff ZBDongle-E

Full Smart Dongles comparison in 2026

Updated April 2026
Data from Amazon and official Smlight and Sonoff sites.
2026 verdict
In 2026, Smlight SLZB-MR3 is the better overall pick. Its strongest advantages show up in power, connectivity, and thread border router, with antenna gain and dual network helping widen the gap. The only strong reason to choose Sonoff ZBDongle-E is if price and warranty is more important to you than the overall verdict. That is enough to make Smlight SLZB-MR3 the better pick for most buyers.
vs
FeatureSmlight SLZB-MR3Sonoff ZBDongle-EWinner
Price$105.99$26.99Sonoff ZBDongle-E
Warranty1 year2 yearsSonoff ZBDongle-E
PowerUSB, PoEUSBSmlight SLZB-MR3
ConnectivityUSB, Ethernet, 2.4 GHz WifiUSBSmlight SLZB-MR3
Thread Border RouterYESNOSmlight SLZB-MR3
Antenna Gain+5dBi2 dBiSmlight SLZB-MR3
Dual NetworkYESNOSmlight SLZB-MR3
Bluetooth ProxyYESNOSmlight SLZB-MR3
Zigbee Chip ModelEFR32MG24 / CC2674P10EFR32MG21Different strengths
Amplifier Gain+20dB+20dBmDifferent strengths
Rating4.74.7Tie
Zigbee RouterYESYESTie
Winner
Smlight

Smlight SLZB-MR3

$105.99
BUY NOW
  • + Power: USB, PoE
  • + Connectivity: USB, Ethernet, 2.4 GHz Wifi
  • + Thread Border Router: YES
  • - Price: $105.99 vs $26.99
  • - Warranty: 1 year vs 2 years

Frequently Asked Questions (FAQ)

Which is better overall: Smlight SLZB-MR3 or Sonoff ZBDongle-E?
Smlight SLZB-MR3 has the stronger overall profile in this comparison, especially for power, connectivity, and thread border router.
What is the biggest difference between Smlight SLZB-MR3 and Sonoff ZBDongle-E?
Price is one of the clearest differences: Smlight SLZB-MR3 lists $105.99, while Sonoff ZBDongle-E lists $26.99.
Which one looks better on price?
Smlight SLZB-MR3 is listed at $105.99, while Sonoff ZBDongle-E is listed at $26.99. Sonoff ZBDongle-E (better spec).
Who should buy Smlight SLZB-MR3?
Choose Smlight SLZB-MR3 if your priority is power and connectivity and that matters more than price.
Who should buy Sonoff ZBDongle-E?
Choose Sonoff ZBDongle-E if your priority is price and warranty and that matters more than power.
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