Technical parameters:

1.Power supply: DC1.5V one 7# Alkaline battery(optional)

2.Measuring range:

  Indoor temperature -30℃～+50℃

  Outdoor temperature -50℃～+70℃

  Relative humidity: 20%～90% RH

3.Resolution:Temperature:0.1℃   Humidity: 1

4.Accuracy: Temperature: ±1℃   Humidity: ±5%℃RH (25℃)