Features:Super compact sizeSuper low power consumptionSuper low voltage operationStandard I2C and 1-wire interface.Semi conductor technologySensing range Temperature: -20 ~ +60 C Humidity: 20-95 RHHumidity: Resolution: 0.1%RH Repeat: -+ 1%RH Precision 25C @ -+5RHTemperature: Resolution: 0.1C Repeat: -+0.2C Precision: 25C @ -+0.5CPower: DC 2.7-5.5VNormal current 1mAStandby current 60uASample cycle: > 2 secondsPin interface: 1. VDD 2. SDA 3. GND 4. SCL (connect to GND when use as 1-wire)