4.3″ TFT colorful touchscreen. Support manual/automatic temperature compensation. Store up to 50 sets of measurement methods. Support storing 2000 sets of pH measurement results, conforming to GLP specification. Support USB connection to PC. Support electrode management, up to 5 pH electrodes. Support calibration editing function, convenient for calibration. With electrode calibration function, automatic recognition of GB, USA, DIN, NIST, MERK, JIS and other pH buffer solutions.