Digital Hygrometer, -40 Degrees to 158 Degrees F/-40 Degrees to 70 Degrees C, 10 Percent to 95 Percent, Primary Scale Temperature, Power Source Battery, Application Indoor, 1 in H x 3 in W 3-Digit LCD Display -1/2 in Digit Height, 4.72 in H x 2.56 in W x 1.38 in D, Surface-Mount, Wall-Mount, Temperature Scale Celsius, Fahrenheit