Strong Stability: The DHT22 sensor combines calibrated digital signal output with advanced technology to ensure high reliability and stability. Easy to Use: The sensor is ideal for long-term use in a variety of environmental conditions and provides accurate readings without the need for additional components. Strong Compatibility: It does not require pull-up resistors, a feature that simplifies connections and enhances compatibility, making it a perfect choice for developers working on IoT projects and smart home applications. Easy to Install: It features a single-bus digital signal output and bidirectional serial data, and is equipped with convenient fixing screw holes for easy installation. Accurate Environmental Monitoring: The sensor operates over a temperature range of -40 to 80 degrees Celsius with an accuracy of +/- 0.5℃, and measures humidity from 0 to 100% RH with an accuracy of ±2% RH. Operate Voltage: DC 3~5.5V Signal Output Type: Digital Temperature Range: -40 ℃ ~ 80 ℃ Temperature Measurement Accuracy: ± 0.5 ℃ Humidity Range: 0~100%RH Humidity Measurement Accuracy: ± 2%RH Screw hole diameter: 2.6mm Colour:White Material:plastic Size:Length: 4.5cm Width: 1.5cm Package Contents: 5 x Sensor module Only 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.