... into indicated calibration solution, press ENTER key and meter is automatically calibrated.Auto-Buffer Recognition:During calibration, ... with date/time stampingOutput: USB Communication InterfacePower Requirements: DC 9V, using AC adapters, 220VAC, 50HzDimensions: 210( ... Buffers, Temperature Probe, Power Adapters BANTE930 Ion meter, pH Meter, ORP Meter (Using the British Electrode, CE Certification)