The Kestrel 5500 Weather Meter comes packed with 14 separate environmental measurements including heading wind direction and speed (current/average/max) cross/head/tail wind altitude pressure trend barometric pressure wet bulb temperature relative humidity heat stress index dewpoint density altitude wind chill and air/water/snow temperature. Engineered for performance the 5500 features a large backlit screen for easy viewing in bright sun with night preserving lighting for work in darkness and has a er-replaceable impeller protected by a flip-top cover. The rugged design is fully waterproof and IP67 and MIL spec rated for e even in the most demanding conditions. The 5500 tracks and logs time-stamped data and has ctomizable storage for 2900 data points. e the B dongle or cable (sold separately) to connect with your Mac or PC to transfer data perform updates and more. The design and function of the Kestrel 5500 make it an indispensable tool for many applications including research military and law enforcement meteorology boating aviation hiking and mountaineering hunting and agriculture. Includes AA battery neck lanyard and protective pouch. The Kestrel 5500 is proudly designed and manufactured in the and is backed by a 5-year warranty.