This manometer is widely used in measuring fan pressure, wind speed, oven pressure, and hydraulic system. This manometer can also be used in controlling the gas ratio in combustion and value control and monitoring the blood pressure and breath pressure with other medical devices. Features: LCD backlight display for easy viewing at day or night. USB port helps to export your data to your PC. Low battery indication and auto power off. Compact design, pocket size, convenient to carry. 11 different units to choose: bar, mbar, kPa, kgf/cm2, mmHg, cmH2O, Ozf/in2, psi, inHg, inH2O, ftH2O. Support record Max, Min, Average values. Specification: Model: GM520 Color: Grey Yellow Measuring Range: 35kPa Accuracy: 0.3%FSO(25) Repeatability: 0.2% (Maximum0.5%FSO) Linearity/Hysteresis: 0.29%FSO Maximum Pressure: 150kPa Response Time: 0.5s Temperature Compensation Function: Yes Positive Overload Alarm: Err.1 Negative Overload Alarm: Err.2 Operating Temperature: 0-50 Storage Temperature: -10~60 Battery: 4*1.5V AAA Batteries (NOT included) Size: Approx. 165*76*38mm/6.5*3*1.5inch Weight: Approx. 404g / 14.3oz Package List: 1 * Digital Manometer 2 * Translucent Silica Gel Hose 2 * Transparent PVC Hose 1 * USB Cable 1 * User Manual 1 * CD Software Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.1LCD backlight display for easy viewing at day or night 2USB port helps to export your data to your PC 3Low battery indication and auto power off 4Compact design, pocket size, convenient to carry 511 different units to choose: bar, mbar, kPa, kgf/cm2, mmHg, cmH2O, Ozf/in2, psi, inHg, inH2O, ftH2O