The La Crosse Technology WS-7014CH Wireless Weather Station transmits the remote temperature via a wireless 915 MHz transmission from the outdoor sensor to the indoor display unit at a range of up to 330 feet. The forecast icon is controlled by changes in the barometric pressure history for the past 36 hours, to generate a forecast for 12-20 hours in advance. Also displayed are indoor temperature and humidity, and time and date, which is set by the U.S. atomic clock.