We are Offering pH Meter, pH705.features: 3 1/2 Digit , Large LCD Display, Max Display 1999Measuring Range: pH 0.0114.00 PHTemperature: 0.1 C 65 C , Millivolt: 1mV?1999mAccuracy: pH Value 0.01PHTemperature: 0.8% , Millivolt : 0.5%Dual DisplayReading Hold FunctionManual/ Automatic Temperature CompensationAuto Power Off, RS-232 Interface.and etc