ApplicationDigital temperature and humidity sensor module for Arduino; DHT11 is a calibrated digital signal of output humiture recombination sensor; Widely used in the heating ventilation air conditioning humidity adjuster etc; With long time stability and ultra long signal transmission distance; Model: DHT11 Operating Voltage: DC 3.3V-5.5V; Humidity Measurement Range: 20%-95%RH; Humidity Measurement Error: +/-5%RH; Temperature Measurement Range: 0~50; Temperature Measurement Error: +/-2; Response Time: Less than 5s; PIN PIN1- VDD :Power On: 3-5.5V DC; PIN2-DATA: Signal output; PIN3-NC: NULL; PIN4-GND: External connection GND