General description This 4-in-1 Water Quality Test Meter is designed for quick and accurate testing of TDS, pH, EC, and temperature, making it ideal for various applications such as swimming pools, aquariums, and drinking water. With a fast detection time of just 5 seconds, this digital tester offers reliable performance at an affordable price. Technical specifications Measuring range: pH 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 target solution, ensuring full