Features Versatile Measurement Units: Choose from 11 different units, including kPa, psi, and bar, to easily adapt to various applications and ensure precise readings for your needs Comprehensive Measurement Functions: Ideal for ventilation and air conditioning systems, this tool provides differential pressure measurements, enhancing your system diagnostics Data Recording Capabilities: Record and view maximum, minimum, and average pressure values, alongside a data hold function for effortless reference during your measurements User-Friendly Large Display: The large backlight screen ensures visibility in various lighting conditions, featuring an over-range prompt and calibration function for accuracy Lightweight and Portable Design: Compact and easy to carry, made from durable ABS material that is wear-resistant and anti-aging, perfect for on-the-go professionals Features: 1、With 11 selections of measuring unit: kPa, psi, kgfcm2, ozin2, bar, mbar, inHg, mmHg, inH？O, ftH？O, cmH？O. 2、Complete functions, differential prure measurement is very suitable for measuring ventilation and air conditioning systems. 3、With the maximum, minimum, average prure value recording and viewing function and data hold function. 4、Large backlight display screen, over？range prompt, calibration function, is a good helper for measuring prure. 5、Compact size and light weight, easy to operate and carry. ABS material, wear-resistant, anti-aging, . Specification: Item Type: Digital Manometer Material: ABS Color: As shown in the picture Size: Approx. 150x55x40mm / 5.91x2.17x1.57in Weight: Approx.200g/7.1oz Range: +5psi Accuracy: ±0.3%FS Linearity/Hysteresis: ±0.1% FS of full scale Prure Range: 2Psi Repeatability: ±0.25%FS Response Time: 0.5 seconds Prure Connection: Two 1/8in (3.18mm) quick connectors Working Temperature: 0~50°C (32~122°F) Storage Temperature Range: -10~60°C (14~140°F) Battery Type: 9V battery (not included) Method: First open the back cover, install the battery, pr and hold the power button for 2 seconds to start up, the screen displays the parameters, adjust the measurement range, you can use it. Function: 1.11 air prure units 2. Differential prure measurement 3. Maximum, minimum, average prure value recording and viewing function 4. Data retention function 5. Large backlit display 6. Low battery reminder function 7. Optional automatic shutdown function 8. Over-range prompt function 9. Calibration function Prure functional unit0.1 Package List: 1 x Digital Manometer(Battery Not Included) 1 x Bag 2 x Hose 1 x Metal Connector 1 x Instruction Manual Note: betweendiv>1. Please allow 1&# Package List 1 x Digital Manometer(Battery Not Included) 1 x Bag 2 x Hose 1 x Metal Connector 1 x Instruction Manual