Extech HD350 Pitot Tube Anemometer + Differential Manometer features simultaneous display of pressure, air velocity or air flow plus temperature readings. The Extech HD350 meter has a ±0.7252 psi range and 5 selectable units of pressure measurement. The Extech HD350 has many functions including max/min/avg recording, a relative time stamp, data hold and auto power off. The Extech HD350 also has a large LCD display with backlighting, a zero function for offset correction or measurement, a USB port and it can store/recall up to 99 readings in each mode. The Extech Pitot Tube Anemometer + Differential Manometer ships complete with Windows compatible software with cable, 9V battery, pitot tube with two 33.5″ connection hoses, 100V-240V universal AC adaptor and hard carrying case.