The Kestrel 5500FW Fire Weather Meter Pro is your all-in-one hand-held belt weather kit monitoring every critical weather measurement plus PIG (Probability of Ignition) and FDFM (Fine Dead Fuel Moisture). Monitor heading wind direction and speed (current/average/max) cross/head/tail wind altitude pressure trend barometric pressure wet bulb and globe temperature relative humidity heat stress index dewpoint density altitude wind chill and air/water/snow temperature. The 5500FW features a large backlit screen for easy viewing all conditions and has a user-replaceable impeller protected by a flip-top cover. The rugged design is fully waterproof (IP67) floats and is drop tested to MIL-STD-810F standards for even the most demanding use. The 5500FW tracks logs and charts thousands of time-stamped data points. Wireless Bluetooth LiNK technology allows you to transfer and monitor data from your iOS/Android device and you can also connect with your Mac or PC to transfer data perform updates and more (USB interface sold separately). Includes AA battery neck lanyard and protective pouch plus PIG and FDFM waterproof cards. The 5500FW is able to withstand harsh environmental extremes without damage and handle the abuses of work on a fire line wherever you re assigned. It is proudly designed and manufactured in the USA and is backed by a 5-year warranty.