Measuring Range Humidity :1~99.9%RH Temperature : -40 ~ 80°C / -40~ 176°F Accuracy Humidity: ±3%RH (10~95%RH, 25 Celsius); ±5%RH (-40~80 Celsius) Temperature: ±0.5°C (at 25Celsius); ±1°C (-40~80Celsius) Resolution Humidity : 0.1%RH Temperature: 0.1%RH Mount Type :Wall-mounted Output: USB signal Power supply : USB 4.8~5.5V