... with Message Indicators * Accuracy: 0.002pH BANTE922 digital pH Meter used for measuring the acidity, alkalinity and Oxidation- ... electrode into indicatedcalibration solution, press ENTER key and meter is automatically calibrated.Auto-Buffer Recognition:During calibration, ... pH Buffers, Temperature Probe, Power Adapter SELON922 Digital pH Meter (Using the British pH Electrode, CE Certification)