The most recent version of the Extreme Wi-Fi Smart Switch, SONOFF MINIR4, is also the smallest
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New Sonoff Mini R4M: Matter arrives at Sonoff - Automatismos_Xl_Mundo
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Flashing Tasmota on Sonoff MiniR4 Extreme with web tools
Sonoff MiniR4 is extreme(ly) small - NotEnoughTech
MINIR4M - SONOFF Official
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SONOFF MINIR4 10A Smart WiFi Extreme Wireless Light Switch,1 Pack, White
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SONOFF MINI Extreme Wi-Fi Smart Switch MINIR4
SONOFF MINI Extreme Wi-Fi Smart Switch (Matter-enabled)