Zero calibration, Auto power on, Anti-wear probe, LCD180 degree reverse display, Test side:V-shaped groove, Built-in probe CM8801F: Fe-type: application to permeability substrate (such as iron, steel, etc.) coating measurement, LCD clock display "Fe"CM8801N: NFe type: Suitable for inter permeability substrate than the substrate (such as aluminum, etc.) coating measurement, LCD always display "NFe ...