White, Wireless Thermometer With Time Features Indoor & Outdoor Temperatures In Fahrenheit & Celsius, High Low Temperature Records & Trend Indicators, Up To 300' Transmission Range, Wall Hanging Or Free Standing, Signal Strength Indicator, Low Battery Indicator, Indoor Temperature Range: 32 To 122 Degrees - 0 To 50 Celsius, Outdoor Temperature Range: -40 To 140 Degrees, -40 To 60 Celsius, Station & Transmitter Each Require 2 "AA" Batteries Not Included.