List of products by brand Sonoff

SONOFF Temperature and Humidity Sensor Si7021
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Precision Relative Humidity Sensor:  ± 3% RH (max), 0–80% RHHigh Accuracy Temperature Sensor:  ± 0.4°C (max), –10 to 85°C0 to 100% RH operating rangeUp to –40 to +85°C operating rangeWide operating voltage (2.2 to 3.6 V)Low Power ConsumptionFactory-calibratedExcellent long term stability