?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. The TDS tester and PH tester have small size and low weight as a pen, they are easy to carry and allow you to take it 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 quickly get a reading. 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 digital EC and TDS meters range from 0 to 19990 ppm. PH resolution is 0.01 pH, accuracy ? 0.05 pH.TDS: 0 ~ 9990ppm, conductivity: 0 ~ 9990us / cm, accuracy: ? 2%, reliable and fast readings. ?Easy Calibration?: The pH tester automatically calibrates at three points (calibration
