Features: 1.Data Recording Function: The digital manometer can record 32 pieces of data, every time you press Store key, the instrument stores data once up to 32 pieces of data. 2.Display Backlight: In order to improve battery life and energy saving of the instrument, the instrument backlight is triggered by the button, and the backlight can be triggered by pressing any key in the normal measurement mode about 60 seconds. 3.High Strength ABS Shell: The shell of the differential meter is made of excellent ABS material, which has high strength and long lasting durability. 4.Portable Gauge: Digital differential pressure gauge is small and compact, easy to store and carry, convenient to use when going out to work. 5.Wide Application: For the auto repair industry to detect intake manifold vacuum, test the brake vacuum pump, exhaust pipe, waste valve, crankcase, gas pipe, air conditioning ventilation system and more. Specification: Item Type: Digital Manometer Material: ABS Accuracy: 0.3% FS Linearity/Hysteresis: 0.1%FS at Full Scale Measuring Range :0~200Kpa 0~30PSI Maximum Pressure Limit: 206.8Kpa, (Overload will damage the instrument) Repeatability: 0.25%FS Measuring Response Time 0.5s (25+2) Pressure Connection: 1/8 "(3.18 mm) Quick Connector Operating Temperature: 0~40 Storage Temperature: -10~60 Overload Alarm: HI (Stop immediately, overload will damage the instrument) Battery: 1 x 9V 6F22 Battery (Shipped Without Battery) Pressure Type: Can measure positive pressure, differential pressure, negative pressure Various Measurement Units: bar, ozin2, psi, inHg, mbar, mmHg, cmH2O, ftH2O, inH2O, Kgcm2, Kpa Application: Auto repair industry, suitable for fuel motor vehicle, engine exhaust valve negative pressure test, engine intake manifold vacuum negative pressure test