Nabu Casa Home Assistant Connect ZBT-2 vs Smlight SLZB-MR4

Data from Amazon and official Nabu Casa and Smlight sites.

2026 verdict

Looking at the full picture in 2026, Smlight SLZB-MR4 gets the edge. What pushes it ahead is power, connectivity, and zigbee router, and amplifier gain and antenna gain keeps 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.

Nabu Casa

Nabu Casa Home Assistant Connect ZBT-2

$65.00

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Winner

Smlight

Smlight SLZB-MR4

Price unavailable right now

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Feature	Nabu Casa Home Assistant Connect ZBT-2	Smlight SLZB-MR4	Winner
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	10 dBm	+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
Matter Bridge	NO	NO	Tie

Nabu Casa

Nabu Casa Home Assistant Connect ZBT-2

$65.00

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- Power: USB vs USB, PoE
- Connectivity: USB vs USB, Ethernet, 2.4 GHz Wifi

Winner

Smlight

Smlight SLZB-MR4

Price unavailable right now

BUY NOW

+ Power: USB, PoE
+ Connectivity: USB, Ethernet, 2.4 GHz Wifi
+ Zigbee Router: YES

Frequently Asked Questions (FAQ)

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 power, connectivity, and zigbee router.
What is the biggest difference between Nabu Casa Home Assistant Connect ZBT-2 and Smlight SLZB-MR4?: Power is one of the clearest differences: Nabu Casa Home Assistant Connect ZBT-2 lists USB, while Smlight SLZB-MR4 lists USB, PoE.
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 power.
Who should buy Smlight SLZB-MR4?: Choose Smlight SLZB-MR4 if your priority is power and connectivity and that matters more than the competing advantages.

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