Wireless Weather Station -4 Degrees to 158 Degrees F/-20 Degrees to 70 Degrees C 1 Percent to 99.9 Percent Primary Scale Humidity Power Source Battery Application Indoor 2.6 in dia 3-Digit LCD Display - 1 in Digit Height 4 in L x 3 3/4 in W x 1 1/4 in D Tabletop Wall-Mount Temperature Scale Celsius Fahrenheit