1. Display: 4.25”H x 2.75”W

2. Wireless range: 200 feet (60 meters)

3. Indoor temperature range: 32°F to 122°F (0° to 50°C)

4. Outdoor range: temperature, dew point, heat index -40°F to 158°F (-40° to 60°C)

5. Alkaline batteries: -20°F to 140°F (-28.8°C to 60°C); Lithium batteries: -40°F to 140°F (-40°C to 60°C)

6. Temperatures below -20°F (-28.8°C) require Lithium batteries for the outdoor transmitter

7. Humidity range: 1% to 99%

8. Requires 3 ”AA” batteries for battery back up (not included)

9. Transmitter requires 2 ”AA” batteries (not included)