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% 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: 0~40C <br> Storage temperature range: -10~60C <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.