La Crosse Technology TX141V3 Wireless Temperature Sensor
- Outdoor temperature range: -40°F to 140°F (-40°C to 60°C).
- Transmission frequency: 433.92 MHz (open air)..
- Transmission range: Up to 300 feet (91 meters).
- Battery life over 1 year with reputable batteries..
- 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)..
- Temperatures below - 20°F (-28.8°C) require Lithium batteries in the outdoor transmitter.
- Power requirements: 2 "AA" Alkaline batteries (not included).