Data from Amazon and official Nabu Casa and Smlight sites.
2026 verdict
Smlight SLZB-MR4 edges out Nabu Casa Home Assistant Connect ZBT-2 in 2026, led by rating, power, and connectivity. What pushes it ahead is rating, power, and connectivity, and zigbee router and amplifier gain keep the advantage from looking narrow. Nabu Casa Home Assistant Connect ZBT-2 remains a niche alternative if its specific feature mix matters more than the rest of the comparison. That makes Smlight SLZB-MR4 the clearer recommendation in 2026.
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| Feature | Nabu Casa Home Assistant Connect ZBT-2 | Smlight SLZB-MR4 | Winner |
|---|---|---|---|
| Rating | 4.8 | 5.0 | Smlight SLZB-MR4 |
| Power | USB | USB, PoE | Smlight SLZB-MR4 |
| Connectivity | USB | USB, Ethernet, 2.4 GHz WiFi | Smlight SLZB-MR4 |
| Zigbee Router | NO | YES | Smlight SLZB-MR4 |
| Amplifier Gain | 10dBm | +20dB | Smlight SLZB-MR4 |
| Antenna Gain | +4.16dBi | +5dBi | Smlight SLZB-MR4 |
| Dual Network | NO | YES | Smlight SLZB-MR4 |
| Bluetooth Proxy | NO | YES | Smlight SLZB-MR4 |
| Zigbee Chip Model | EFR32MG24 | EFR32MG26 / CC2674P10 | Different strengths |
| Warranty | 1 year | 1 year | Tie |
| Z-Wave Controller | NO | NO | Tie |
| Thread Border Router | YES | YES | Tie |
$65.00
- - Rating: 4.8 vs 5.0
- - Power: USB vs USB, PoE
Winner
Price unavailable right now
- + Rating: 5.0
- + Power: USB, PoE
- + Connectivity: USB, Ethernet, 2.4 GHz WiFi
Frequently Asked Questions
Which is better overall: Nabu Casa Home Assistant Connect ZBT-2 or Smlight SLZB-MR4?
Smlight SLZB-MR4 has the stronger overall profile in this comparison, especially for rating, power, and connectivity.
What is the biggest difference between Nabu Casa Home Assistant Connect ZBT-2 and Smlight SLZB-MR4?
Rating is one of the clearest differences: Nabu Casa Home Assistant Connect ZBT-2 lists 4.8, while Smlight SLZB-MR4 lists 5.0.
Who should buy Nabu Casa Home Assistant Connect ZBT-2?
Choose Nabu Casa Home Assistant Connect ZBT-2 if your priority is its specific strengths and that matters more than rating.
Who should buy Smlight SLZB-MR4?
Choose Smlight SLZB-MR4 if your priority is rating and power and that matters more than the competing advantages.
Full comparison table
Compare all 35 Dongles side by side
You are looking at two of them. The full table lines up all Dongles in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 35 Dongles
- 32 specs compared
- 29 filters
SmlightSLZB-MRW10
$100.00
SmlightSLZB-06 U
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SmlightSLZB-MR3
SmlightSLZB-MR4
SmlightSLZB-MR5U
$119.99
SmlightSLZB-07
$34.99- Nabu Casa
Home Assistant Connect ZBT-2
$65.00 
SmlightSLZB-MR1U
$102.99
SmlightSLZB-07p7
$36.99
ZoozZ-Wave Long Range Stick
$39.95
SonoffDongle Plus MG24
$35.90
SonoffZBDongle-P
14% OFF$39.99$34.57
SonoffZBDongle-E
8% OFF$26.99$24.90
SonoffDongle-PZG23
$39.90
SmlightSLZB-06M
$72.99
SonoffDongle Plus PP10
$35.90
SmlightSLZB-06p7U
$78.99
SmlightSLZB-MR2
£160.48
SonoffDongle Lite MG21
$24.90
AeotecZ-Stick 7
$39.99
DonglesSmlightSLZB-06 MG24
$82.99
DonglesSmlightSLZB-06 MG26
$84.99- DonglesSmlight
SLZB-06 U
$72.99 
DonglesSmlightSLZB-06
$72.99- DonglesSmlight
SLZB-06M
$72.99 
DonglesSmlightSLZB-06P10
$85.99
DonglesSmlightSLZB-06p7
$79.99- DonglesSmlight
SLZB-06p7U
$78.99 
DonglesSmlightSLZB-07 MG24
$45.99
DonglesSmlightSLZB-07 MG26
- DonglesSmlight
SLZB-07
$34.99 
DonglesSmlightSLZB-07P10
$48.99- DonglesSmlight
SLZB-07p7
$36.99 
DonglesSmlightSLZB-MR1
$103.99- DonglesSmlight
SLZB-MR1U
$102.99 - DonglesSmlight
SLZB-MR2
£160.48 - DonglesSmlight
SLZB-MR3
- DonglesSmlight
SLZB-MR4
- DonglesSmlight
SLZB-MR5U
$119.99 - DonglesSmlight
SLZB-MRW10
$100.00