Supply voltage range: 2.4 to 5.5V (typically 3.3V)RH working range: 0-99.99%RH ; I2C interface, communication rate up to 1MHz, with two -selectable addressesOperating temperature range: -40 to 125Celsius (-40 to 257Fahrenheit)RH response time: 8 seconds (tau63%)Typical accuracy is +/- 2% RH and +/- 0.3 inch with high accuracySensor Manufacturer: SHT31-DISRH response time: 0-100% RHInterface: I2CPower Pins:Vin - this is the power pin. The chip can use 2.5-5VDC for power. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V Mini like for , use 5V. For a 3.3V controller like a Pi, connect to 3.3V GND - common ground for power and logicSCL - I2C clock pin, connect to your microcontrollers I2C clock line. This pin has a 10K pullup resistor to VinSDA - I2C data pin, connect to your microcontrollers I2C data line. This pin has a 10K pullup resistor to Vin - This is the I2C address pin. This pin has a 10K pull down resistor to make the default I2C address 0x44. You can tie this pin to Vin to make the address 0x45 - Hardware reset pint. Has a 10K pullup on it to make the chip active by default. Connect to ground to do a hardware reset ALR - Alert/Interrupt output. You can set up the sensor to alert you when an event has occured. Check the datasheet for how you can set up the alertsColour:PurpleMaterial:plasticPackage Contents:4 x SHT31-D Temperature Humidity SensorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.