?4 in 1? A very complete kit to check the quality of your water, whether it comes from the tap, the recovery, the aquarium or a swimming pool. TDS tester and PH tester are small in size and light in weight as a pen, easy to carry and easy to take in your pocket when you go out. Ease of use: ? The TDS water tester locks the measurement result when you press the ‘HOLD’ button. and automatically turns off after several minutes of non-use. The pH tester has an automatic calibration function and you can get a reading quickly. And these 2-in-1 pH and TDS meters are also perfect for home or lab testing. High Accuracy: The numbers of the pH meter range from 0.00-14.00 (PH ), while the numbers of the EC and TDS digital meters range from 0 to 19990 ppm. PH resolution is 0.01pH, Accuracy ±0.05pH.TDS: 0~9990ppm, Conductivity: 0~9990us/cm, Accuracy: ±2%, Reliable and fast readings. ?Easy Calibration? : The pH tester automatically calibrates at three points (calibration only at 6.86 points:
