This BENETECH GM510 Plastic High Precision Handheld Digital Pressure Gage has 11 pressure units-bar， mbar， kpa， kgf/cm2， mmHg， cmH2O， Ozf/in2， psi， inHg， inH2O， ftH2O for your selection. Featuring data hold function， data correction function and auto power off function， this digital pressure gage is contributive. Besides， with USB cable and interface， it can connect computer through special software for data reading and analyzing. This digital pressure gage is widely used to measure fan and air blower pressure， filter resistance， wind speed， etc. Also， it is used to control ratio between air and coal gas during burning， as well as blood pressure and respiratory pressure in medical health-care equipment. How multifunctional and practical!                                    Features             11 kinds of pressure units<br> Data hold and data correction functions<br> Ultra large LCD display with backlight<br> With USB communication function<br> With difference value mode and record mode<br> Zero setting function<br> Battery condition display<br> Auto power off function <br>                                                            Specifications             Brand     BENETECH    <br> Model     GM510    <br> Power Supply     4 x 1.5V AAA Batteries(Not Included)    <br> Accuracy     ±0.3%FSO(25℃)    <br> Repeatability     ±0.2% (Max. ±0.5%FSO)    <br> Linearity/Hysteresis     ±0.29%FSO    <br> Dimensions     (6.69 x 3.03 x 1.25)" / (17 x 7.7 x 3.2)cm (L x W x H)    <br> Color     Gray&Orange    <br> Weight     8.21oz / 233g    <br> Material     Plastic    <br> Response     Typical 0.5s    <br> Low Battery Indication     Yes    <br> Up Overload Indication     Err1    <br> Down Overload Indication     Err2    <br> Operation Temperature     0~50℃    <br> Storage Temperature     -10~60℃    <br> USB Communication     Yes     <br>                                                             Package Includes            1 x Pressure Manometer<br>1 x USB Cable<br>2 x Translucent Silica Gel Hose<br>2 x Transparent PVC Hose<br>1 x CD<br>1 x User Manual<br>