BENETECH GM520 LCD Display Pressure Manometer(Yellow) Main Features: 1) Brand & Model: BENETECH GM520 2) Display: LCD display 3) Measuring range: -35kPa ~ +35kPa 4) Accuracy: -0.3%FSO ~ +0.3%FSO (25C) 5) Repeatability: -0.2% ~ +0.2% (Max+﹣0.5%FSO) 6) Linearlag: -0.29%FSO ~ +0.29%FSO 7) Max Pressure: 150 kPa 8) Response time: A typical 0.5 seconds 9) Low battery prompt functions 10) Range in temperature Revise 11) Beyond the positive pressure range: Err.1 12) Beyond the negative pressure range: Err.2 13) Working temperature: 0﹣50C 14) Storage temperature: -10﹣60C 15) Power: 4 x AAA battery (indluded) 16) USB interface 17) 11 kinds of specific pressure 18) Apply to testing fan and blower pressure, filter resistance, wind speed, furnace pressure, orifice's differential pressure, bubble water level, hydraulic system pressure, etc. Also apply to controlling the gas ratio in the combustion process and automatic valve, monitoring blood pressure and respiratory pressure. Package Contents: 1) 1 x Pressure manometer 2) 4 x AAA Batteries 3) 4 x Plastic pipes 4) 1 x USB cable 5) 1 x English manual