"2psi range, 11 Selectable units of measure Max/Min/Avg recording and Relative time stamp Data Hold, Auto power off and Zero function Large LCD display with backlighting Heavy duty, double-molded housing Built-in USB port (Windows" compatible PC software and cable included) Specifications Dimensions 8.2x2.9x1.9in (210x75x50mm) inH?O 55.40inH?O (0.01inH?O) Mbar 137.8mbar (0.1mbar) Kpa 13.78kPa (0.01kPa) inhG 4.072inHg (0.001inHg) mmHg 103.4mmHg (0.1mmHg) ftH?O 4.616ftH?O (0.001ftH?O) kgcm" 0.140kgcm" (0.001kgcm") cmH?O 140cmH?O (0.1cmH?O) PSI 2psi (0.001psi)