4) Pressure Units: 11 kinds of units are selectable, H2O, Psi, Mbar, Bar, kPa, inHg, mmHg, Ozin2, ftH2O, cmH2O and KgCm.
5) Wide Application: A indispensable testing tool for HVAC technician, operation maintenance engineers and researchers. (HVAC: Heating, Ventilation and Air Conditioning)