Excelvan Professional Wireless Weather Station Internet Upload Plus UV and Light Index, PC Connect with Forecast Temperature Humidity Warranty: All Excelvan weather stations have 1 year warranty, 100% satisfaction and zero hassle returns guaranteed. Temperature/Humidity: Measuring Range: -10 to +60(indoor), -40 to +60(outdoor). Solar powered transimitter uses 2x AA rechargeble batteries to transimit UV index and light index to the main station. The UV intensity indicators is to show the UV intensity level from 0-12 and light intensity unit between FC and LUX. Wind Direction: Wind speed units in mph, km/h, m/s, knots or bft(user selectable). Rainfall data in 1 hour, 24 hours, one week, one month and total since last reset display. Rainfall units in mm or inch(user selectable). Min/Max reading for indoor and outdoor temperature, humidity, UV Index, light Index, heat Index, wind speed, rainfall, wind chill, dew point and pressure. Weather alarm modes for: Temperature, humidity, wind chill, dew point, rainfall, wind speed and air pressure. Data Recorded: Free PC software for transfer weather data to PC. All the weather data from the base station up to 3520 sets of weather history data with user adjustable measurement intervals can be recorded and uploaded to your PC. Forecasting: Weather icons based on changing barometric pressure, which units in hPa, mmHg or inHg. Memory modes can look over the earlier or later weather history. Large LCD display displays time in 12/24 format, day of week and date. High light backlight makes the weather station easy to view even in the dark. The weather station can be wall-mounted or can stand-alone with the built-in stand.