... Large Displayer with Message Indicators * Accuracy: 0.002pH BANTE922 digital pH Meter used for measuring the acidity, alkalinity and ... time stampingOutput: USB Communication InterfacePower Requirements: DC 9V, using AC adapters, 220VAC, 50HzDimensions: 210(L)mm×188(W) ... Electrode, pH Buffers, Temperature Probe, Power Adapter SELON922 Digital pH Meter (Using the British pH Electrode, CE Certification)