Specifications: Product Specification Description pH Range 0.00 to 14.00 pH Resolution & Accuracy 0.01 & ±0.01 pH Ion Concentration Range Not available Resolution & Accuracy - mV Range ±199.9 mV; ±1999 mV Resolution & Accuracy 0.1 mV & ±0.2 mV (within ±199.9 mV);1 mV & ±2 mV (beyond ±200 mV) Temperature Range 0.0 to 100.0 °C Resolution & Accuracy 0.1 °C & ±0.3 °C No. of Calibration Points Up to 3 points pH Buffer Options USA (pH 4.01, 7.00, 10.01); NIST (pH 4.01, 6.86, 9.18) Memory 50 Data Sets Temperature Compensation Automatic / Manual (0 to 100 °C) Recorder Output Yes Special Functions Stability Indicator; Self-diagnostic;Hold & pH Slope/Offset Display Power 9VDC, using AC adapters 110VAC or 220VAC, 50/60 Hz