Features:_x000D_ _x000D_ This product has 11 air pressure units and is fully functional. _x000D_ Differential pressure measurement is ideal for measuring ventilation and air condition systems. _x000D_ With maximum, minimum, average pressure value recording and viewing capabilities, and data retention features. _x000D_ Large with backlit display for clearer data display. _x000D_ There is a low battery prompt function, you can choose the automatic shutdown function, overrange prompt function and calibration function. _x000D_ _x000D_ Specifications:_x000D_ Condition: 100% New_x000D_ Material: Plastic_x000D_ Range: +2psi_x000D_ Accuracy: 0.3% FS_x000D_ Linearity/hysteresis: 0.1% of full scale FS_x000D_ Repeatability: 0.25% FS_x000D_ Pressure connection: two 1/8" (3.18 mm) quick connectors_x000D_ Working temperature: 0~40C_x000D_ Storage temperature range: -10~60C_x000D_ Product size: approx. 150 x 55 x 30mm / 5.9 x 2.2 x 1.2in_x000D_ Battery type: 9V battery (Battery not included)_x000D_ _x000D_ Package list:_x000D_ 1 x Digital pressure gauge (Battery not included)_x000D_ 2 x Plastic hose_x000D_ 1 x Metal connector_x000D_ 1 x Portable bag_x000D_ 1 x English manual_x000D_ _x000D_ Note:_x000D_ 1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding._x000D_ 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.