Portable 4 in 1 meter pH/EC/TDS/Temp, range 0.00 to 14.00 pH, 0.00 TO 20.00 mS/cm, 0.00 TO 10.00 ppt, 0.0 TO 60.0 °C, resolution 0.01 pH, 0.1 mS/cm, 0.01 ppt, 0.1 °C, accuracy (AT 25 °C) ± 0.01 pH, ± 2% FS, ± 0.5 °C, typical EMC deviation ± 0.01 pH, ± 2% FS, ± 0.5 °C, Automatic Temperature Compensation, pH calibration in 1 or 2 points with automatic sample recognition, EC calibration: automatic in 1 point, supplied with MA851D/1 amplified probe, a 9 V battery.