High precision and reliability:: More accurate precision design and wider testing range than other products, ensuring your drinking water is healthy. Accuracy 0.01; 5 in 1 Water TDS PH Meter:: The TDS meter has 5 in 1 function, which can measure pH, TDS, EC, salinity and water temperature. Meet all your testing requirements: fully test water quality! Easy to use, no calibration:: The water pH tester has been factory calibrated before leaving the factory, no need to recalibrate, it can be used right out of the box. Simply dip the pH tester probe into the liquid to start taking test measurements. COMPACT SIZE AND BACKLIGHT DESIGN: The digital pH meter is easy to carry and use. Anyone can use this small, professional handheld TDS tester to measure drinking water, pool water, aquarium water, garden water and more. Simple and fast:: Simply turn on the TDS meter and gently stir the water, then the LCD screen will automatically lock and stabilize the reading in seconds, and the tds ppm meter will automatically turn off. if there is no operation for more than 2 minutes.