4-in-1 mode: With this 4-in-1 pH tester, you can accurately measure pH, TDS, EC and temperature values; clearly understand the water quality and protect the health of your family. High accuracy: Equipped with a high-sensitivity probe, the results can be read quickly; the wide measurement range and high resolution that you can measure different types of liquids. Automatic temperature compensation: This 4-in-1 pH meter is equipped with an ATC function, which solves the problem of inaccurate measurement caused by temperature changes in the liquid; easily obtain reliable and stable readings. Easy to use: After calibration, put the sensor in the solution to be tested and you can get data immediately; please clean the probe carefully before testing again; otherwise, inaccurate readings may occur. Wide application: Suitable for home and laboratory testing; buy one for testing drinking water, beer and kombucha; also suitable for aquariums and hydroponics. Color: As Shown Material: ABS Package Contents: 1 x Test pen 4 x Calibration kit 1 x Chinese and English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.