Features:Temperature Compensation Function. LCD backlight display for easy reading. Data hold function. Differential mode and record mode. USB port helps to export your data to your PC. Data record and adjustment function. Multi-unit selection. Low battery indication and auto power off. Specification: Measuring range: 10kPaAccuracy: 0.3%FSO(25C)Repeatability: 0.2%(Maximum+/-0.5%FSOLinearity/hysteresis: 0.29%FSOUp overload indication: Err1Down overload indication: Err2Operating temperature: 0~50CStorage temperature: -10~60CResponse: Typical 0.5 sLow battery indicationUSB communication Temperature Compensation FunctionPackage List:1 xGM511Pressure manometer4 x Plastic pipes1 x USB cable1 * CD software1 x English manual Please Note: 1.Battery not included (because not convinient for shipping).2.Without plastic box,(If you need the plastic box,need add shipping cost)