The Kestrel 3500 measures every environmental condition simply with the press of a button! Note: This unit has a BLUE Backlight. Measures - Current Wind Speed, Maximum Wind Gust, Average Wind Speed, Air, Water & Snow Temperature, Wind Chill and Relative Humidity, Measures - Dewpoint, Heat Stress Index, Barometric Pressure, Altitude and Wet Bulb Temperature, Model Year: 2011, Product ID: 106875, GTIN: 0730650035007