... , dual parameter 2. Automatic buffer recognition and two-point calibration table PH meterFunction, Large screen, LCD display, dual parameterAutomatic buffer recognition ... .3°C±1 bitStability (0.01pH±1 bit)/3hTemp Compensation, Manual/Auto,0~99.9°CCalibration, Up to twoBuffer Recognition Automatic ... , 4.00,6.86,9.18Display LCD, dual parameterISO certified table PH Meter