... dual parameter 2. Automatic buffer recognition and two-point calibration table PH meterFunction, Large screen, LCD display, dual parameterAutomatic buffer ... .Specifications,Parameter,pH / mV(ORP)/°CpH range,-2.00~18.00mV range,±1999Temperature range,0.0~99.9°CpH Resolution ... .01Specifications ,Parameters , pH / mV(ORP)/°CpH Range,-2.00~18.00mV Range,±1999Temperature Range, 0.0~99.9°CResolution pH ...