Honeywell TE601CELW Color Weather Forecaster with Indoor/Outdoor Thermometer Economical way to monitor indoor and outdoor temperature, barometric pressure and more for up to three locations Wireless sensor has transmission range of up to 100 feet Measures temperatures to as low as minus 38 degrees Fahrenheit and up to 158 degrees Fahrenheit Clock never needs resetting; automatically adjusts to within one second of official government time Measures 2.79 x 7.08 x 2.79 inches (WxHxD)