REED Instruments R3002 Digital Manometer, Gauge/Differential, 5psi Measures gauge and differential pressure up to 5psi (11 selectable units of measure: psi, inH2O, bar, mbar, kPa, inHg, mmHg, ozin2, ftH2O, cmH2O, kgcm2) Max, Min, Avg, Relative and Data hold functions Integrated real-time clock time-stamps measurements USB interface and PC software to download data Includes 4 Connection Hoses, USB Cable, Software, Battery and Hard Carrying Case