The multi-line LCD features a bar graph that indicates the direction of the vacuum- movement from left to right indicates increasing pressure and in the opposite direction indicates decreasing pressure. Gauge includes an auxiliary port that allows for quick cleaning and drying of the sensor. Use the built-in hanger for added versatility in mounting. Auto shutoff feature turns gauge off after ten minutes when vacuum reads above 12,000 µ (12 Torr). operates on one 9 V battery (not included). gauge is ideal for both field and laboratory applications measures vacuum from 0 to 12000 microns in seven user-selectable units-microns, psi, inches of mercury (in Hg), Torr, millitorr, millibars, and pascals.