1) Outdoor temperature range: -40.0°C to + 65.0°C (-40°F to +149°F)

2) Indoor temperature range: 0°C to + 50.0°C (32°F to +122°F)

3) Humidity range: 1% to 99% (1% resolution)

4) Transmission range up to 100m (330 feet)

1. a) Receiver: 3 x AA alkaline batteries (not included)
2. b) Sensor WH1: 2 x AA alkaline batteries (not included)

5) Transmission frequency: 433MHz