The Honeywell TE852W is a Weather Forecaster with Wind Speed Indicator. The main unit displays your local weather forecast for the upcoming 12 to 24 hours with the Graphical Weather Forecasting icons (cloudy, rainy, sunny, etc.) at the top of the display screen and shows the Wind Speed and Wind Chill from the (TS815), included, Wind Speed meter that will transmit up to 100". Wind speed and gust alarms can be user set. The last 24 hours of barometric pressure is shown in an easy to read history chart. See the indoor and outdoor temperature and humidity at a glance in either Celsius or Fahrenheit. The outdoor temperature and humidity are transmitted from a small sensor (TSC33C), included, that can be located up to 328 feet from the main unit. The Honewell TE852ELW supports up to 3 remote sensors and with an auto scan feature to display the temeperature at each sensor automaticly. Users will also delight in the unit"s wide outdoor temperature range--which varies from -38 to 158 degrees F when powered by lithium batteries to -4 to 158 degrees F on alkaline batteries Get the most accurate time from the Atomic Clock accurate to within one second of official U.S. government time and features dual alarm with snooze. A built in ice warning can be set to wake you early because of freezing temperatures. The display unit, which mounts on the wall or sits on the desktop, requires two AA batteries (not included), as does each remote sensor. The system is also backed by a one-year warranty.