Wireless Weather Station Sensor Temperature Range -4 Degrees to 158 Degrees F/-20 Degrees to 70 Degrees C (Sensor 1) -40 Degrees to 140 Degrees F/-40 Degrees C to 70 Degrees C (Sensor 2) 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