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The Kestrel 2500 NV has the same features as his more colorful counterpart, but is olive drab with a visible red backlight, which helps sustain the user's natural night vision. Military personnel and pilots flying in darkness are often concerned with preserving their night vision. It takes 30 to 45 minutes for the average eye to adapt to darkness and maximize night vision. Even a short burst of white, yellow, green or blue light "bleaches out" the rod cell photoreceptors in the eye and causes night blindness until the entire adaptation process can take place again. Light in the red spectrum does not cause this "bleaching out", preventing night blindness and night vision fatigue. The units' red backlight is also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. Measure environmental conditions quickly and accurately with the Kestrel 2500. This portable and easy to use weather meter is perfect for any activity that requires accurate assesment of the environment. Featurewise, the 2500 is a midpoint between the Kestrel 2000 and Kestrel 3000. It has all the functionality of the Kestrel 2000, plus it provides Barometric Pressure and Altitude. Importantly for weather forecasting, it also includes a 3-hour pressure-trend indicator - a feature not found in the Kestrel 2000 or Kestrel 3000 models. The Kestrel 2500 runs on a user-replaceable battery with a 400-hour average lifespan. Covered by Kestrel's standard 2-Year Warranty. Measures * Current Wind Speed * Maximum Wind Gust * Average Wind Speed * Air, Water & Snow Temperature * Wind Chill * Barometric Pressure * Altitude Features * Measure environmental conditions quickly and accurately * Forecast weather with pressure trend indicator * Reliable, portable and easy to use * All instruments and accessories are completely assembled in the USA * Patented user-replaceable impeller * Quick response, external thermistor * High precision pressure sensor * Real-time clock * Protective cover with sure-grip overmolding * Data hold function * Large easy-to-read display with backlight * Waterproof and floats * Lanyard and battery included * Warranty: 5 years
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