Wireless Weather Station, Sensor Temperature Range -40 Degrees to 158 Degrees F/-40 Degrees to 70 Degrees C, 1 Percent to 99 Percent, Number of Sensors 3, Transmission Range 330 ft, Primary Scale Outdoor Humidity/Temperature, Base Power Source Details (3) AA Batteries, Base Temperature Range 32 Degrees to 122 Degrees F/0 Degrees to 50 Degrees C, 3 1/4 in H X 3 5/8 in W 2-Digit LCD Display - 3/4 in Digit Height, 5.4 in W x 5 in H (Base)/1.6 in W x 4.8 in H x 0.9 in D (Sensor)