Digital display gauge or differential pressure. Select psi, inH2O, bar, mmHg, ozin2, kgcm2, kPa, ftH2O, inHg, cmH2O and mbar. Bright backlight. Data hold and record. Min/max button. Simple fittings for hose connection. Optional Model RS232KIT: PC Interface Kit. 0-30 psi (to 830 inH2O); Res.(bar) 0.002. Includes: Connection Hose, Hard Case, Battery.