Smlight SLZB-MR1 vs Sonoff Dongle Lite MG21

Updated March 2026

Data from Amazon and official Smlight and Sonoff sites.

2026 verdict

For 2026, Smlight SLZB-MR1 is the stronger overall choice. It builds its lead on power, connectivity, and antenna gain, then backs it up with a stronger showing on dual network and bluetooth proxy. Sonoff Dongle Lite MG21 can still be the right pick, but only if price and rating outweighs the wider strengths of Smlight SLZB-MR1. For most setups, Smlight SLZB-MR1 is the smarter buy.

Winner

Smlight

Smlight SLZB-MR1

$103.99

BUY NOW

Sonoff

Sonoff Dongle Lite MG21

$19.90

BUY NOW

Feature	Smlight SLZB-MR1	Sonoff Dongle Lite MG21	Winner
Price	$103.99	$19.90	Sonoff Dongle Lite MG21
Rating	4.5	4.7	Sonoff Dongle Lite MG21
Power	USB, PoE	USB	Smlight SLZB-MR1
Connectivity	USB, Ethernet, 2.4 GHz Wifi	USB	Smlight SLZB-MR1
Antenna Gain	+5dBi	+3dBi	Smlight SLZB-MR1
Dual Network	YES	NO	Smlight SLZB-MR1
Bluetooth Proxy	YES	NO	Smlight SLZB-MR1
Zigbee Chip Model	EFR32MG21 / 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

Winner

Smlight

Smlight SLZB-MR1

$103.99

BUY NOW

+ Power: USB, PoE
+ Connectivity: USB, Ethernet, 2.4 GHz Wifi
+ Antenna Gain: +5dBi
- Price: $103.99 vs $19.90
- Rating: 4.5 vs 4.7

Sonoff

Sonoff Dongle Lite MG21

$19.90

BUY NOW

+ Price: $19.90
+ Rating: 4.7
- Power: USB vs USB, PoE
- Connectivity: USB vs USB, Ethernet, 2.4 GHz Wifi

Frequently Asked Questions (FAQ)

Which is better overall: Smlight SLZB-MR1 or Sonoff Dongle Lite MG21?: Smlight SLZB-MR1 has the stronger overall profile in this comparison, especially for power, connectivity, and antenna gain.
What is the biggest difference between Smlight SLZB-MR1 and Sonoff Dongle Lite MG21?: Price is one of the clearest differences: Smlight SLZB-MR1 lists $103.99, while Sonoff Dongle Lite MG21 lists $19.90.
Which one looks better on price?: Smlight SLZB-MR1 is listed at $103.99, while Sonoff Dongle Lite MG21 is listed at $19.90. Sonoff Dongle Lite MG21 (better spec).
Who should buy Smlight SLZB-MR1?: Choose Smlight SLZB-MR1 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.

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