PH/MV METER DIGITAL MICROPROCESSOR BASED (SOFT TOUCH KEYS)With 4 digit LED display , MTC (Manual Temp.Comp.), 3 points (4.00, 7.00 & 9.20) Auto Buffer recognition, 3points (4.00, 7.00 & 9.20) ph calibration (Auto & Manual). Along with complete accessories (i.e. ph electrode combined , temp.probe, electrode stand, buffer sol, Dust cover & Manual). THERE ARE MANY TYPES OF PH METERS.