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, 180.0km/h Measures Wind Direction : false Displays speed in km/h : true Displays speed in knots : true Wind gust : km/h Records Minimum : true Records Maximum : true Data Hold : false Relative Measure : false Display Type : LCD Display Backlight : Green LED Backlit Width : 142.0mm Height : 90.0mm Depth : 30.0mm Battery used for : Main Product Battery type : AA Battery quantity : 3.0pc Batteries included : false Batteries can be replaced : true Battery compartment location : Back How is battery compartment kept closed : Clip Battery used for : Transmitter Battery type : AA Battery quantity : 2.0pc Batteries can be replaced : true Weather Station Style : Weather Station Storm Warning : true Touch Screen : false Calender : true Wind Chill : true Dew Point : true Sensor Type : Remote wireless sensor Additional Sensor Channels : 1.0ch Sensor Battery Size : AA Sensor Battery Quantity : 3.0pc Sensor Battery Type : Alkaline