Keep a weather station in the house to get a quick and accurate view of various weather parameters. This unit records temperature, wind chill, wind speed/direction, dew point, humidity and more. It also features alarm modes for temperature, humidity, wind chill and more. Easy to setup, just place the weather sensors outside and keep the LCD inside as a free standing unit or mounted on a wall. Data will be transmitted wirelessly to the display unit over distances up to 100m. It features an LED backlight for greater reading clarity in poor light. Windchill: -40 degrees Celsius to 65 degrees Celsius (-40 degreesF to 149 degreesF) Records min/max temperature Weather alarm mode: Temperature, humidity, wind chill, dew point, rainfall, wind speed Wind speed: km/h, mph, m/s, knots, Beaufort Wind direction 12 or 24 hour time display Time alarm Optional power supply for base station Relative Humidity : true Absolute Humidity : false Measures in Celcius : true Outdoor / Exterior Scale : -40.000000 degrees Celsius, 65.0 degrees Celsius Indoor / Interior Scale : -9.900000 degrees Celsius, 60.0 degrees Celsius Celcius Accuracy : +/- 1 degrees Celsius Measures in Fahrenheit : true Outdoor / Exterior Scale : -40.000000 degreesF, 149.0 degreesF Indoor / Interior Scale : 14.0 degreesF, 140.0 degreesF Thermometer Resolution : 0.1 degrees Celsius Wind Speed Range : 0.0km/h, 180