Features [High Accuracy Measurement] With a measurement range of ±30Psi (206.8Kpa) and an accuracy of ±0.3%FS, this digital manometer ensures precise readings. [11 Units] Switch effortlessly between 11 different units including PSI, kPa, Kgcm2, ozin2, bar, mbar, inHg, mmHg, inH2O, ftH2O, and cmH2O, versatile for various measurement needs. [Multi Features] This air pressure meter features data hold, maximum minimum average measurement, large LCD with backlit, low battery reminder, and auto power off function. [Data Recording] With the capability to store up to 32 data sets with timestamps, this gas pressure tester facilitates easy data analysis, suitable for various applications requiring data logging. [Wide Application] This differential manometer is ideal for measuring air and ventilation system pressure, pressure system calibration and troubleshooting, HVAC, gas equipment maintenance and installation, laboratory testing, and more. Specification: Item Type: Digital Manometer Material: ABS, TPU Accuracy: ±0.3%FS Linearity Hysteresis: ±0.1%FS of full scale Limit Maximum Pressure: 206.8Kpa (Overrange use will damage the instrument) Repeatability: ±0.25%FS Measurement Response Time: About 0.5 seconds (25℃±2℃) Pressure Connection: One 1/8in (3.18mm) quick connector Operating Temperature: 0℃ to 40℃ Storage Temperature Range: -10℃ to 60℃ Overrange Prompt: HI (Please stop using if this prompt appears, overrange use will damage the instrument) Battery: 1 x 9V battery (Not included) Battery Model: 6F22 9V battery Package List:1 x Digital Manometer 1 x Hose 1 x Metal Adapter 1 x Black Head 1 x User Manual 1 x Storage Box Package List 1 x Digital Manometer 1 x Hose 1 x Metal Adapter 1 x Black Head 1 x User Manual 1 x Storage Box