Included PC Interface Wind Chill, Direction and Speed Rain Data Forecast w/ Tendency IN/OUT Temp IN/OUT Humidity Weather Alarms w/ Storm Warning Dimensions: Receiver: 8.9" x 6" x 1.25" Thermo-Hygro: 5.5" x 2.8" x 2.5" Rain: 5.5" x 5.75" x 2.5" Wind: 8" x 10" x 2.75" All Features: Record 175 sets of weather data with "Heavy Weather" PRO PC software Upload weather data to your PC with easy COM port connection Weather forecasting function with 3 weather icons and weather tendency indicator Wireless outdoor temperature (°F or °C) Wireless outdoor humidity (%RH) Monitors indoor temperature (°F or °C) Monitors indoor humidity (%RH) Records MIN/MAX temperature with time and date of recording Records MIN/MAX humidity with time and date of recording Barometric air pressure (inHg or hPa) Records MIN/MAX barometric pressure with time and date or recording Dew point (°F or °C) Records MIN/MAX dew point with time and date or recording Wind direction with LCD compass (numerical (e.g. 225°) or abbreviated characters (e.g. SW)) Wind speed (mph, km/h, or m/s, Knots, and Beaufort Scale) Records MIN/MAX wind speed with time and date of recording Wind chill (°F or °C) Records MIN/MAX wind chill with time and date of recording Rainfall data (inches or millimeters): 1 hour, 24 hour, and total Records MIN/MAX rainfall with time and date of recording Transmission range up to 330 feet (100 meters) Weather alarms for (20 total): temperature, humidity, wind chill, dew point, rainfall, wind speed and direction, air pressure, storm warning Atomic time and date with manual setting Automatically updates for Daylight Saving Time (on/off option) Perpetual calendar Time zone setting Time alarm 12/24 hour time display EL backlight Wall hanging or free standing Swiss precision sensor AC power adapter included Specifications: Rainfall Range: 0" to 98.38" (0 to 249.89cm) Wind Speed Range: 0 mph to 111.8 mph (0 to 179.92 km/h) Absolute Barometric Pressure Range: 8.85 inHg to 32.45 inHg Wireless Outdoor Humidity Range: 1% to 99% Indoor Humidity Range: 1% to 99% Wireless Outdoor Temperature Range: -21.8°F to 157.8°F (-29.8°C to 69.8°C) Indoor Temperature Range: 14.1°F to 139.8°F (-9.9°C to 59.8°C) Transmission Range: Up to 330 feet (100 meters) Transmission Frequency: 433.92 MHz Swiss Precision Sensor Power requirements: Receiver: 3 "AA" Alkaline Batteries or AC Power Adapter (INPUT 120V AC 60HZ) Wireless Thermo-Hygro Sensor: 2 x "AA" Alkaline Batteries - can draw power from AC adapter, if used Wind and Rain Sensors: Power by Thermo-Hygro Sensor