Smlight SLZB-06 vs Sonoff Dongle Lite MG21 comparison

Updated June 2026

Data from Amazon and official Smlight and Sonoff sites.

2026 verdict

In this 2026 Smlight SLZB-06 vs Sonoff Dongle Lite MG21 comparison, Smlight SLZB-06 comes out ahead thanks to power, connectivity, and antenna gain. It wins the broader comparison through power, connectivity, and antenna gain, while bluetooth proxy helps confirm the result. The only strong reason to choose Sonoff Dongle Lite MG21 is if price and rating is more important to you than the overall verdict. That makes Smlight SLZB-06 the clearer recommendation in 2026.

Winner

Smlight

Smlight SLZB-06

$74.99

Buy on Amazon USA

Sonoff

Sonoff Dongle Lite MG21

$19.90

Buy on Amazon USA

Feature	Smlight SLZB-06	Sonoff Dongle Lite MG21	Winner
Price	$74.99	$19.90	Sonoff Dongle Lite MG21
Rating	4.3	4.6	Sonoff Dongle Lite MG21
Power	USB, PoE	USB	Smlight SLZB-06
Connectivity	USB, Ethernet, 2.4 GHz WiFi	USB	Smlight SLZB-06
Antenna Gain	+5dBi	+3dBi	Smlight SLZB-06
Bluetooth Proxy	YES	NO	Smlight SLZB-06
Zigbee Chip Model	CC2652P	EFR32MG21	Different strengths
Amplifier Gain	+20dB	+20 dBm	Different strengths
Warranty	1 year	1 year	Tie
Zigbee Router	YES	YES	Tie
Z-Wave Controller	NO	NO	Tie
Thread Border Router	YES	YES	Tie

Winner

Smlight

Smlight SLZB-06

$74.99

Buy on Amazon USA

+ Power: USB, PoE
+ Connectivity: USB, Ethernet, 2.4 GHz WiFi
+ Antenna Gain: +5dBi
- Price: $74.99 vs $19.90
- Rating: 4.3 vs 4.6

Sonoff

Sonoff Dongle Lite MG21

$19.90

Buy on Amazon USA

+ Price: $19.90
+ Rating: 4.6
- Power: USB vs USB, PoE
- Connectivity: USB vs USB, Ethernet, 2.4 GHz WiFi

Frequently Asked Questions

Which is better overall: Smlight SLZB-06 or Sonoff Dongle Lite MG21?

Smlight SLZB-06 has the stronger overall profile in this comparison, especially for power, connectivity, and antenna gain.

What is the biggest difference between Smlight SLZB-06 and Sonoff Dongle Lite MG21?

Price is one of the clearest differences: Smlight SLZB-06 lists $74.99, while Sonoff Dongle Lite MG21 lists $19.90.

Which one looks better on price?

Smlight SLZB-06 is listed at $74.99, while Sonoff Dongle Lite MG21 is listed at $19.90. Sonoff Dongle Lite MG21 (better spec).

Who should buy Smlight SLZB-06?

Choose Smlight SLZB-06 if your priority is power and connectivity and that matters more than price.

Who should buy Sonoff Dongle Lite MG21?

Choose Sonoff Dongle Lite MG21 if your priority is price and rating and that matters more than power.

More Dongles

Top Dongles to compare next

Compare smart dongles by supported protocols, connectivity, hardware specs, integrations, automations, and compatibility with platforms like Matter, Zigbee, and Thread.

Compare Dongles