[4-in-1 Mode]With 4-in-1 pH tester, you can accurately measure pH, TDS(ppm), EC(S/cm / /cm), and temp value, and know water quality clearly to your family member's health. [High Accuracy]With the highly sensitive probe, you can get a full measurement range of 0-14pH, 0.01 pH resolution, and the pH meter uses a 3-point calibration to calibrate the electrode to solutions of pH 4.00, pH 6.86, and pH 9.18. You can calibrate effortlessly to the accuracy of your measurements. [Automatic Temperature Compensation]With the ATC function, the 4-in-1 pH meter solves the inaccurate measuring problem caused by the change of liquid temperature; Backlit LCD Design guarantees that you can read the measuring results in any condition, to get a reliable, stable reading. [Easy to Use]After calibration put the sensor into the solution you want to test, and get the data immediately, before another test, wash the probe carefully; Or you may get an inaccurate reading. [Wide Application]perfect for household and laboratory testing applications, for drinking water, beer, and kombucha testing, and good for aquariums, ponds in a garden, bathtub, and swimming pool use, too. for one-time use and cannot be . It needs to be replaced when it is used up. And if want to keep the tip of the pH meter wet, you can use potassium chloride on the market. [Calibration instructions]Currently only pH calibration powder, EC and TDS standard solutions are not included, so only pH calibration, calibration powder + distilled water stirring is the calibration solution. Color: Red & White Material: plastic Package Contents: 1 x Tester 3 x packs of calibration powder 1 x Instruction Manual in English and Chinese 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.