The Kestrel 3500 Handheld Weather Meter Quickly changing weather conditions require constant, immediate updates. Measure wind speed, temperature, relative humidity, dew point, and wet bulb temperature with One instrument. At the press of a button, get all relevant conditions you need to enable yourself to switch strategies, reduce risk, and ensure safety. Split second decisions in the field leave no time for guesswork. Get every environmental condition in seconds with the affordable, reliable Kestrel 3500. The Kestrel 3500 pocket weather meter is a rugged, multi-function wind and weather meter that measures all the environmental variables that you need to calculate accurate ballistic solutions and train your environmental insight at the range.