Usage Tips:3 IN 1 Multifunctional Measuring: pH meter has a three-in-one function, which can measure PH, TDS and temperature with high precision. You just need to remove the protective cover and immerse the pH meter electrode in the solution.Backlit LCD Design: 't worry about seeing the displayed value when there is insufficient light. ph tester digital is equipped with a high-quality titanium alloy probe and glass electrode that can achieve fast and convenient testing. Put the probe into the liquid to be tested, wait for 1 second and read.High Accuracy: Supplied with calibration powders pH 4.00, pH 6.86, pH 9.18. Press the automatic calibration button, the water pH meter will automatically recognize the calibration, easy and convenient. The detailed manual included will show you how to thecurate and stable reading.Waterproof and Dustproof: IPX67 high-level waterproof and dustproof can protect testing instruments . Liquid temperature may affect reading levels, digital pH water quality tester can accurately measure the pH value of the sample in the temperature range of 0C-60C / 32-140, and PH tester can automatically identify the calibration solutions to read the digital in a snap.material: plasticColor shownPackage Contents:1 X Water Quality Monitor Tester3 X Buffer 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.