DHT21 \/ AM2301 Capacitive Digital Temperature And Humidity Sensor Module<br> Features:  <br> 1. Accurate，durable and high quality<br> 2. 4 pin package<br> 3. Ultra low power<br> 4. No additional components<br> 5. Excellent long-term stability<br> 6. All calibration，digital output<br> 7. Completely interchangeable<br> 8. Long distance signal transmission<br> 9. Relative humidity and temperature measurement<br>  <br> Specifications:  <br> 1.Power: 3.3-5.2V DC<br> 2.HUMI: 0~99.9% RH<br> 3.TEMP: -40 ~ 80\u2103<br> 4.Precision: &amp;plusmn;3% RH，  &amp;plusmn;0.5 \u2103<br> 5.Output: Digital (1 wire)<br> 6.Dimension: 60 x 27 x 14mm(L*W*H)<br>  <br> Note:   Please pay attention to the Voltage \/Current \/ Power of your own devices. To ensure product safety，check whether this item is compliant with your own devices before you buy it!  <br>  <br> Package included:  <br> 1 x DH21\/AM2301 Digital Temperature and Humidity Sensor Arduino