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2pc Combo Kit Set of Tds/EC Meter and PH Meter. Tds + Ec + Ph Meter All-in-One Water Quality Tester COMBO of Total Dissolved Solids (TDS), Electrical Conductivity (EC), Potential of Hydrogen (PH) for Checking Water Impurities. Multifunctional Water Testing Kit: TDS + PH + EC + Temperature Meter. PH Meter Specifications: Range: 0.0 to 14.0 pH Resolution: 0.1 pH Accuracy: ±0.1 pH Calibration: manual, 1 point Environment: 0 to 50°C / 32 to 122°F; max RH 95% Battery Type: 3 x 1.5V, alkaline (included) Battery Life: approx. 700 hours of continuous use Dimensions: 15cm x 3cm x 2.4cm Weight: 85 g without case TDS EC Meter Specifications: TDS: 0-9990 ppm (parts per million) Conductivity: 0-9990 µs/cm Degrees Celsius: 0.1-80.0°C Fahrenheit: 32.0-176.0°F Accuracy: ±2% Battery: 1 * 3V CR2032 button battery (included) Item weight: 51g without case Item size: 15.4 x 3.0 x 1.4cm Package Contents: 1 x TDS EC Meter and 1 x PH Meter