Orion Versa Star* Pro pH/mV benchtop meter ROSS difficult sample kit 100-240V^ Orion Versa Star Pro pH/mV benchtop meter ROSS difficult sample kit, Range: -2.000 to 20.000pHResolution: 0.1, 0.01, 0.001pH, Probe Type: pH/ ORP electrode, reference half-cell electrode, ATC/stirrer probe, 100-240V