Wide measurement range: 5MHz probe: 0.040 to 20 of steel, 10MHz probe: 0.020" to 20 of steel (optional) Color LCD display with red, yellow and green visual alarm indication 100K internal datalogger with export to Excel File compare feature as a real time corrosion monitor Echo to Echo option to reduce coating errors Live Waveform (A-scan for thickness verification) B-scan (visual cross section of test piece) Vibrates on alarm