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Sonoff 4CH PRO R3 Multichannel Smart Switch Wifi Remote Control Smart Automation 10A CO2 Detector Module 125 kHz BW) Communication Range 125 kHz BW) Communication Range Up to 10 km (line of sight) Interface SPI (MOSI 2mm OD Corrugated Flexible Conduit operates safely between 40 to +80 degrees Celsius Sonoff 4CH PRO R3 Multichannel Smart Switch Wifi Remote Control Smart Automation 10A
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