Features: <br> <br>This product has 11 air pressure units and is fully functional. <br>Differential pressure measurement is ideal for measuring ventilation and air condition systems. <br>With maximum, minimum, average pressure value recording and viewing capabilities, and data retention features. <br>Large with backlit display for clearer data display. <br>There is a low battery prompt function, you can choose the automatic shutdown function, overrange prompt function and calibration function. <br> <br>Specifications: <br>Condition: 100% Brand New <br>Material: Plastic <br>Range: +2psi <br>Accuracy: ±0.3% FS <br>Linearity/hysteresis: ±0.1% of full scale FS <br>Repeatability: ±0.25% FS <br>Pressure connection: two 1/8" (3.18 mm) quick connectors <br>Working temperature: 0~40°C <br>Storage temperature range: -10~60°C <br>Product size: approx. 150 x 55 x 30mm / 5.9 x 2.2 x 1.2in <br>Battery type: 9V battery (Battery not included) <br> <br>Package list: <br>1 x Digital pressure gauge (Battery not included) <br>2 x Plastic hose <br>1 x Metal connector <br>1 x Portable bag <br>1 x English manual <br> <br>Note: <br>1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. <br>2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.<br>1、This product has 11 air pressure units and is fully functional <br>2、Differential pressure measurement is ideal for measuring ventilation and air condition systems <br>3、With maximum, minimum, average pressure value recording and viewing capabilities, and data retention features <br>4、Large with backlit display for clearer data display <br>5、There is a low battery prompt function, you can choose the automatic shutdown function, overrange prompt function and calibration function