Smlight SLZB-06p7U vs Sonoff Dongle Lite MG21 comparison

Updated June 2026

Data from Amazon and official Smlight and Sonoff sites.

2026 verdict

Smlight SLZB-06p7U edges out Sonoff Dongle Lite MG21 in 2026, led by power, connectivity, and antenna gain. It separates itself most clearly on power, connectivity, and antenna gain, while still looking better on bluetooth proxy. The only strong reason to choose Sonoff Dongle Lite MG21 is if its specific feature mix is more important to you than the overall verdict. That is enough to make Smlight SLZB-06p7U the better pick for most buyers.

Winner

Smlight

Smlight SLZB-06p7U

Price unavailable right now

Buy on Official Store

Sonoff

Sonoff Dongle Lite MG21

$19.90

Buy on Amazon USA

Feature	Smlight SLZB-06p7U	Sonoff Dongle Lite MG21	Winner
Power	USB, PoE	USB	Smlight SLZB-06p7U
Connectivity	USB, Ethernet, 2.4 GHz WiFi	USB	Smlight SLZB-06p7U
Antenna Gain	+5dBi	+3dBi	Smlight SLZB-06p7U
Bluetooth Proxy	YES	NO	Smlight SLZB-06p7U
Zigbee Chip Model	CC2652P7	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
Matter Bridge	NO	NO	Tie
Dual Network	NO	NO	Tie

Winner

Smlight

Smlight SLZB-06p7U

Price unavailable right now

Buy on Official Store

+ Power: USB, PoE
+ Connectivity: USB, Ethernet, 2.4 GHz WiFi
+ Antenna Gain: +5dBi

Sonoff

Sonoff Dongle Lite MG21

$19.90

Buy on Amazon USA

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

Frequently Asked Questions

Which is better overall: Smlight SLZB-06p7U or Sonoff Dongle Lite MG21?

Smlight SLZB-06p7U has the stronger overall profile in this comparison, especially for power, connectivity, and antenna gain.

What is the biggest difference between Smlight SLZB-06p7U and Sonoff Dongle Lite MG21?

Power is one of the clearest differences: Smlight SLZB-06p7U lists USB, PoE, while Sonoff Dongle Lite MG21 lists USB.

Who should buy Smlight SLZB-06p7U?

Choose Smlight SLZB-06p7U if your priority is power and connectivity and that matters more than the competing advantages.

Who should buy Sonoff Dongle Lite MG21?

Choose Sonoff Dongle Lite MG21 if your priority is its specific strengths and that matters more than power.

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