Compact and easy-to-use with preprogrammed ion calibration points mV mode allows you to check electrode calibration and performance /- 1999 mV range is compatible with virtually all ISE electrodes Meter Type Portable Display type LCD Min pH (pH)0 Max pH (pH)14 pH Resolution0.01 or 0.1 pH Accuracy±0.01 pH Buffer RecognitionDIN, NIST, and USA CalibrationUp to 5 points Min mV (mV)-1999 Max mV (mV)1999 mV Resolution0.1 or 1 mV mV Accuracy±1mV 1 digit Min ISE0.01 to 1999 ppm ISE Resolution0.01 ppm ISE Accuracy±0.5% of reading Min Temperature (° C)-10 Max Temperature (° C)110 Min Temperature (° F)14 Max Temperature (° F)230 Temperature compensation Automatic Battery 4 x AAA batteries (included) Battery life (hr)700 Width (cm)8.5725 Height (cm)4.28625 Width (in)3 3/8 Height (in)1 11/16 > Each Unit Includes ATC probe Protective rubber boot Batteries. pH electrode pH buffer solutions Solution bottles Rinse bottle Carrying case