For the diehard weather watcher! The multi-functional Professional Weather Center from La Crosse Technology provides everything from the time and temperature to the barometric pressure and wind chill. Makes a nice gift for the avid outdoorsman! Features: Time display (manual setting) 12/24 hour time display Calendar display (weekday, date, month, year) Time alarm function Weather forecasting function with 3 weather icons and weather tendency indicator Wireless outdoor temperature (°F or °C) Wireless outdoor humidity (%RH) Records MIN/MAX temperature and humidity with time and date of recording Low/High outdoor temperature and humidity alarm Relative air pressure (inHg or hPa) Barometric pressure with 12 hour history graph (in inHg or hPa) LCD contrast selectable Low battery indicator Wind direction displayed in 16 steps Wind speed (mph, km/h or m/s, and Beaufort scale) Wind chill (°F or °C) MAX wind speed with time and date of recording High alarm fuction for wind speed Manual reset of outdoor temperature/ humidity, pressure and wind chill data Total rainfall (inches or millimeters) Storm warning alarm Buzzer on/off selectable Storage of 200 sets of history weather data recorded in 3-hour intervals Wireless transmission at 915 MHz Transmission range up to 330 feet (100 meters) Wind speed range: 0 to 111.8 mph (0 to 207 km/h) Wind chill range: -39.8°F to 139.8°F (-39.8°C to 59.9°C) Outdoor humidity range: 1% to 99% (%RH) Outdoor temperature range: -39.8°F to 139.8°F (-39.8°C to 59.9°C) Transmission range: Up to 330 feet (100 meters) Dimensions: Receiver: 8.9" x 6" x 1.25" Thermo-Hygro: 2.25" x 2.44" x 6.18" Rain sensor: 5.51" x 2.75" x 5.39" Wind sensor: 9.84" x 6.45" x 7.58" Power requirements: Receiver: 3 “AA” Alkaline batteries Thermo-Hygro sensor: 2 “AA” Alkaline batteries Wind sensor and rain gauge: Powered by Thermo-Hygro sensor specifications