The sensor outputs a calibrated digital signal in a standard I2C format. Diversified output modes, wide operating voltage range, and high temperature accuracy and humidity accuracy HTU21 series modules are specially designed for low power consumption and small size applications. They have the advantages of , fast response speed, strong anti-interference ability, high cost performance, etc., small size (3x3mm), and extremely low power consumption. Very suitable for environmental sensing and data recording, very suitable for weather stations or wet dust control systems Power supply voltage: 1.5V-3.6 Humidity measurement range: 0-100%RH Temperature measurement range: -40-105 Maximum power consumption: 2.7uW Communication : I2C Humidity accuracy range (10%RH to 95%RH): HTU21D +/- 2%RH Humidity hysteresis: +/- 1%RH Measuring time: 50ms Annual drift: -0.5%RH/year Response time: 5 s Colour: as shown Material: ABS Package Contents: 1 set x Sensor module 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.