1. Multifunction tester: the 5-in-1 water quality tester easily measures pH / TDS / EC / temperature and salinity of the liquid sample to judge the purity or pollution of the water. 2. High accuracy: the high-precision algorithm chip and the efficient sensitivity electrode ensure a fast and accurate response. With the accurate ATC, the pH / TDS / EC / SALT / TEMP function can accurately read sample values over a wide temperature range of 0 ~ 60 and thus solve the problem of inaccurate measurements caused by temperature fluctuations of the liquid. 3. Automatic calibration: the multifunctional pH meter uses a 3-point calibration process. You can easily calibrate to ensure the accuracy of your measurements. No adjustment required before use, convenient to use. 4. High quality pH meter: the green backlit LCD design ensures the reading of results in all conditions. The one-button reading lock helps to lock the reading, even when the tester is taken out of the sample IP67 is an international waterproof and dustproof certification. Protection against dust penetration, short-term immersion. 5. Compact and versatile: with this pocket tester (batteries included), compact and powerful, you can measure your aquarium, swimming pool, garden pond, bath to test the pH values. It can also be used to measure drinking water, RO system, spa, soap mixes, food, wine, beer or other liquids.