This digital manometer measures gauge/differential pressure from -55H2O to +55H2O(5psi). It features 11 selectable units of measure: in H2O， pis， bar， mbar， Kpa， inHg， mmHg， ozin2， ftH2O， kgcm， additional features include data hold and auto power off disabled，careful use of this meter will provide years of reliable service. 

Features:
11 selectable units of measure.
Max/min/average， and with a relative time.
Large LCD back light dual display， easy to read.
Zeroing， offset， and data compensation.
Low battery display and automatic shutdown.
Data hold and error code.

Specifications:
Main Color: Beige
Display: Dual LCD
Function        Range          Resolution 
InH2O          ±138.3         0.01            
Ozin⊃2;          ±80          0.01
Psi           ±5.000         0.001
FtH₂O          ±11.53         0.001
Mbar           ±344.7         0.1
cmH₂O          ±351.5         0.1
Kpa           ±34.47         0.01    
Kgcm⊃2;          ±0.351         0.001
inHg           ±1.018         0.001
Bar           ± 0.344        0.001
mmHg           ±258.5         0.1               
Measure Range: ±34.47KPa
Accuracy: ±0.3% FSO(25°C)
Repeatability: ±0.2%(Max±0.5%FSO)
Linearity/Hysteresis: ±0.29%FSO
Maximum Pressure: 20psi
Response Time: 0.5s typical
Low Range Indicator: Err.1
Under Range Indicator: Err.2
Operating Temperature: 0~50 °C(32~122 °F)
Storage Temperature: -10~60 °C(14~140 °F)
Power: 1 * 9V battery (NOT included)
Item Size: Approx. 16.2 * 5.5 * 3.3cm / 6.4 * 2.2 * 1.3in
Item Weight: Approx. 126.9g / 4.5oz
Package Size: Approx. 25.7 * 14.2 * 6.4cm / 10.1 * 5.6 * 2.5in
Package Weight: Approx. 216g / 7.6oz

Package List:
1 * Pressure Gauge
1 * User Manual 
1 * Protection Bag
2 * Soft Hose
1 * Copper Pipe