General description This 4-in-1 Water Quality Test Meter is designed for quick and accurate testing of TDS, pH, EC, and temperature in various water sources such as swimming pools, aquariums, and drinking water. With a fast detection time of just 5 seconds, this digital tester is both reliable and affordable, making it an essential tool for anyone concerned about water quality. Technical specifications pH Measuring Range: 0.00 - 14.00 pH Resolution: 0.01 pH pH Accuracy: ±0.01 pH TDS Measuring Range: 0 - 9990 ppm Conductivity Measuring Range: 0 - 9990 µs/cm TDS Accuracy: ±2% Temperature Range: 0.1 – 80.0 °C (32.0 – 176.0 °F) Dimensions: 155mm x 31mm x 18mm Weight: 50g (pH Meter), 55g (TDS Meter) Power: 2 x 1.5V LR44 batteries (over 500 hours of use) Compatibility and accessories Includes: 1 x pH Meter 1 x TDS Meter 6 x Calibration Packs 1 x User Manual Installation Remove the protective cap from the meter. Press the ON/OFF button to turn on the device. Immerse the electrode in the