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 user-selectable addresses Operating temperature range: -40 to 125 Celsius (-40 to 257 Fahrenheit) RH response time: 8 seconds (tau63%) Typical accuracy is +/- 2% RH and +/- 0.3 inches with high accuracy Sensor Manufacturer: #SHT31-DIS RH response time: 0-100% RH Interface: I2C Power 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 Arduino, use 5V. For a 3.3V controller like a Pi, connect to 3.3V GND - common ground for power and logic SCL - I2C clock pin, connect to your microcontroller's I2C clock line. This pin has a 10K pullup resistor to Vin SDA - I2C data pin, connect to your microcontroller's I2C data line. This pin has a 10K pullup resistor to Vin ADDR - This is the I2C address select pin. This pin has a 10K pull down resistor to make the default I2C address 0x44. You can connect this pin to Vin to make the address 0x45 RESET - Hardware reset pin. Has a 10K pullup on it to make the chip active by default. Connect to ground to perform a hardware reset! ALR - Alert/interrupt output. You can set the sensor to alert you when an event has occurred. Check the datasheet for how to set up the alerts Color: Photo color Material: plastic Package contents: 3 x SHT31-D Temperature and Humidity Sensor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowed measurement error is +/- 1-3 cm.