●pH Meter Measurement Range: 0.00 - 14.00, Resolution: 0.01 pH, Accuracy: ±0.01 pH, Automatic Temperature Compensation Range: 0 - 60 °C. This high precision pH meter can be easily measured in minutes and can be accurately checked pH (ph/decline depending on water temperature. Please note: ●TDS EC Meter Measurement Range: 0-9999ppm Water Quality (TDS)), 0-9999μ/cm Conductivity (EC), 0.1-80.0°C / 32.0-176.0°F (temperature) Accuracy: ±2% ●Suitable for fishermen, aquariums, pools, school labs, laboratories, aquariums, tropical fish breeding, food & beverages ●3-Point Automatic Calibration: Equipped with 3-point automatic calibration function of PH4.00/PH6.86/PH9.18, and also provides automatic temperature compensation. Simply dip the electrode in the pH calibration fluid and press the CAL button to automatically calibrate. More convenient than traditional manual pH meter (wash thoroughly after each measure) ●Package Contents: pH measuring instrument, TDS & EC measuring instrument (pH 6.86, pH 4.01, 1 bag each)