This Kestrel meter does it all. The Kestrel 5500 weather meter provides the same trusted accuracy, reliability, and usability as the original Kestrel 4500. Measure every environmental condition plus wind direction, crosswind and headwind/tailwind. Use it golfing, sailing, flying, spraying, shooting and more. Drop proof, dust proof, waterproof and able to withstand extreme environments without damage, your Kestrel weather meter travels with you anywhere you dare to go. A range of carry pouch options makes it even easier to take your Kestrel meter with you. The Kestrel 5500 pocket weather meter is Kestrel's powerful, mini weather station. The Kestrel 5500 is a major upgrade from the Kestrel 4500. Functionally, you're getting more environmental features with some big improvements to the overall meter. Features: Air, water, and snow temperature deg F or deg C Current, average, and maximum air velocity Waterproof (sealed to IP67 standards) Time and date Easy to read backlit display Data logging - automatic and manual Customizable data storage - 12000 data points Measures all of the parameters required for CAMEO/ALOHA software and PEAC-WMD software by Aristatek to monitor plume dispersion Minimum, maximum and average value Multi-function 3 line display Humidity sensor can be recalibrated in the field with our relative humidity calibration kit Exterior temperature, humidity, and pressure sensors for fast and accurate readings Customize screens to display user-selected measurements Graph and recall trends User replaceable impeller Flip top impeller cover allows use of other functions while protecting the impeller Data charting Upload to a computer (with optional interface) Mac or PC Works with android and iPhone apps Five languages (English, French, Spanish, German, and Italian)