The Kestrel 2500NV has an easy-to-use altimeter and 3-hour pressure trend! Equipped with a night-vision preserving backlight. Backlight incorporates optical filter to reduce overall brightness and minimize blue and green spectrum light to preserve night vision. (Note: This backlight appears soft grayish pink, not red, and is still in the visible spectrum, so is not compatible with night-vision equipment.) Measures - Current Wind Speed, Maximum Wind Gust, Average Wind Speed, Air, Water & Snow Temperature, Wind Chill, Barometric Pressure and Altitude, Model Year: 2011, Product ID: 106873, GTIN: 0730650025015