DHT11 Humidity & Temperature Sensor Specification: Operating Voltage: 3-5V Humidity: 20%-80%, 5% accuracy Temperature: 0° to 50°C, ±2°C accuracy Features: Good for 20-80% humidity readings with 5% accuracy Good for 0-50°C temperature readings and ±2°C accuracy No more than 1 Hz sampling rate (once every second) 4 pins with 0.1′ spacing Package Included: 1 x DHT11 Digital Temperature and Humidity sensor