Improved display, processor and data logging. Same dependable measurements, including air density and moisture content.;Optional wireless LiNK communication with the free Kestrel LiNK app and compatible PC, Mac, iOS and Android devices.;Patented accuracy - NIST-traceable calibration.;Rugged, waterproof and reliable in the most demanding conditions. IP67 & MIL spec rated.;5-year limited warranty and made in the USA.