This monitor is a member of of quality monitors ours. The Continuous Monitor Series feature microprocessor technology,which gives it many reliable,user-friendly features.These monitors were designed for long-term low-maintenance use,just plug in the AC adapter,calibrate and the unit is ready for continuous monitoring. Specifications: Range: pH: 0.00 ~ 14.00pH Resolution: pH: 0.01pH Accuracy: pH: ±0.1pH Temperature Compensation: 0°C ~ 50°C Working temperature: 0°C ~ 50°C Power Supply: DC 6V (Power-supply Adaptor) Input Voltage: AC 220V Battery: 4x1.5V AG13/LR44 Button Cell Batteries (NOT Included) Fetures: Widely used to test the pH of solution/water. IC and high cost performance. Easy calibration of pH with just a mini-screwdriver. Electrode probe can be replaced, ATC function. Automatic temperature compensation. Large and clear LCD with backlight, easy to read and accurately testing functions. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Material: ABS colour: As shown Package Contents: 1 x water quality analyzer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.