Features: Professional Manometer: it can test the differential pressure of areas and pipes, wind velocity of pipeline. It has 2Psi(kPa) pressure range and 0.3 percent accuracy. Clear Display: 2.4-inch LCD screen with backlight display for easy reading. 12 Selections of Measuring Unit: Pa, psi, kgfcm2, bar, inH2O, ftH2O, inHg, mmHg, ozin2, mbar, cmH2O, kPa. Other Features: Max. or Min. or Average value measurement function calibration, data hold and zero function. User-friendly Prompt: low battery indication, Hi and Lo over range indicator. Low Power Consumption andamp Power Saving: powered by 3pcs AAA batteries(NOT included), and it will automatic power off after no operation for 10 minutes. Compact Size andamp Lightweight: easy to operate and carry, it also comes with a protective pouch. Wide Applications: applied on chemical industry, electrical industry, nuclear industry to measure the difference of air pressure, etc. Specifications: Material: ABS Pressure Range: andplusmn 2.000Psi Measuring Unit: Pa, psi, kgfcm2, bar, inH2O, ftH2O, inHg, mmHg, ozin2, mbar, cmH2O, kPa Accuracy: andplusmn 0.3 percent FSO (at 25) Repeatability: andplusmn 0.2 percent (max.andplusmn 0.5 percent FSO) Linearity or Hysteresis: andplusmn 0.29 percent FSO Data Storage: 99 groups Respond Time: 0.5s Out of Range Indicator: Hi or Lo Auto-off: No operation for 10 minutes Operating Temperature: 0-50 or 32-122 Storage Temperature: -10-60 or 14-140 Power Supply: 3 x 1.5V AAA battery (NOT included) Item Size: 167 x 67 x 31mm or 6.57 x 2.64 x 1.22in Item Weight: 158g or 5.58oz Package Weight: 247g or 8.72oz Package Size: 20 x 12 x 5cm or 7.87 x 4.72 x 1.97in Packing List: 1 x Manometer 1 x Metal Connector 2 x Plastic Pipes 1 x Pouch 1 x Manual(English)