The meter can measure the differential pressure conveniently. It features 11 selectable units of measure: inH2O, psi, bar, mbar, Kpa, InHg, mmHg, ozin2, FtH2O, cmH2O, kgcm2. It's used for testing ventilation and air conditioning system, spot check, clean room, or any gas pressure system troubleshooting. 

Features:
Large LCD backlight display, providing clear reading.
11 selectable units for measurement, convenient for use.
Max./Min./Avg values, and with a relative time clock.
Low battery indicator and pressure unit indicator.
Zero adjustment, offset and DIF function.
Data hold and automatically shutdown function.

Specifications:
Display: LCD Backlight
InH2O Range: ±55.40; Resolution: 0.01
Psi Range: ±2.000; Resolution: 0.001
Mbar Range: ±137.8; Resolution: 0.1
Kpa Range: ±13.79; Resolution: 0.01
InHg Range: ±4.07; Resolution: 0.001
MmHg Range: ±103.4; Resolution: 0.1
Ozin2 Range: ±32; Resolution: 0.01
FtH2O Range: ±4.612; Resolution: 0.001
CmH2O Range: ±140.6; Resolution: 0.1
Kgcm2 Range: ±0.140; Resolution: 0.001
Bar Range: ±0.137; Resolution: 0.001
Accuracy: ±0.3%FSO(25°C)
Repeatability: ±0.2%(Max. +/-0.5%FSO)
Linearity/Hysteresis: ±0.29%FSO
Max. Pressure: 10Psi 
Response Time: 0.5s Typical 
Low Battery Indicator: Yes
Over Range Indicator: Err. 1
Under Range Indicator: Err. 2
Operating Condition: 0-50°C / 32-122°F
Storage Condition: -10-60°C / 14-140°F
Power Supply: 1 * 9V Battery (NOT Included)
Item Size: 170 * 55 * 33mm / 6.7 * 2.16 * 1.3in
Item Weight: 127g / 4.51oz
Package Size: 25.5 * 14 * 6.5cm / 10 * 5.5 * 2.56in
Package Weight: 229g / 8.07oz

Package List: E1053
1 * Digital Manometer
1 * Leather Pouch
2 * Flexible Tube
1 * Metal Accessory
1 * User Manual (English)