4 in 1 mode: With this 4 in 1 pH tester, you can accurately measure PH, TDS, EC and Temp values; purify water quality and protect your family's health High Accuracy: With high sensitivity probes, results can be read quickly; wide measuring range and high resolution allow you to measure different kinds of liquids Automatic temperature compensation: This 4-in-1 pH meter has ATC function, which solves inaccurate measurements caused by liquid temperature changes; easy to get reliable and stable readings Ease of use: After calibration, place the sensor in the solution you want to test and get the data immediately; before testing again, clean the probe thoroughly; or you may get an inaccurate reading Wide range of applications: Ideal for home and lab testing applications; buy one for drinking water, beer, kombucha testing; also suitable for aquariums and hydroponics We only sell water quality monitors, not other items in the picture. Due to the differences between different monitors, the pictures may not reflect the actual color of the item. Due to manual measurement, please allow slight errors in size.