Professional Manometer: it can test the differential pressure of areas and pipes, wind of pipeline. It has +/-2Psi(kPa) pressure range and +/-0.3% accuracy. Clear Display: 2.4-inch LCD screen with backlight display for easy reading. 12 Selections of Measuring Unit: Pa, , kgfcm2, bar, inH2O, ftH2O, inHg, mmHg, ozin2, mbar, cmH2O, kPa. Other Features: Max./Min./Average value measurement function; calibration, data hold and zero function. -friendly Prompt: low battery indication, Hi and Lo over range indicator. Low Power Consumption & Power Saving: powered by 3pcs AAA batteries(NOT included), and it will automatic power off after no operation for 10 minutes. Size & 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: Pressure Range: 2.000Psi Measuring Unit: Pa, , kgfcm2, bar, inH2O, ftH2O, inHg, mmHg, ozin2, mbar, cmH2O, kPa Accuracy: 0.3% FSO (at 25) Repeatability: 0.2% (max.0.5%FSO) Linearity/Hysteresis: 0.29% 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 / 32~122 Storage Temperature: -10~60 / 14~140 Power Supply: 3 * 1.5V AAA battery (NOT included) Material: ABS colour: Black+Red Package Contents: 1 x Manometer 1 x Metal Connector 2 x Plastic Pipes 1 x Pouch 1 x Manual(English) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.