DHT21/AM2301 Capacitive Digital Temperature and Humidity Sensor, 2-Pack High-Precision Digital Output: The DHT21/AM2301 sensor provides a digital signal output with high precision, stability, and strong anti-interference capability, suitable for applications requiring accurate environmental monitoring. Exceptional Long-Term Stability: Featuring advanced digital module detection and humidity sensing technology, this sensor delivers consistent performance and reliability across varying environmental conditions. Easy Installation and Versatile Use: This 4-pin sensor requires no external components, enabling simple integration into various projects. Its extended signal transmission range supports flexible placement and layout customization. Wide Measuring Range with High Accuracy: Measures temperature from -40°C to 80°C and humidity from 0% to 100% RH, with temperature accuracy of ±0.5°C and humidity accuracy of ±2% RH, ideal for diverse environmental monitoring needs. Long Signal Transmission for Diverse Layouts: Designed for extended signal transmission, this digital sensor supports remote sensing applications, ensuring reliable data collection over larger areas. Color: Black Material: Plastic The actual product may have slight color variations due to lighting and display differences, which do not affect functionality. Package Contents: 2 x Digital Temperature and Humidity Sensor Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3 cm.