1. Seven-in-one water quality meter: This tester has functions for measuring salinity, ORP, TDS, pH, SG, EC, and temperature. With this convenient pH meter, you can complete your work faster and more easily than ever before! 2. Easy to use: The easy-to-use digital pH meter only requires you to remove the protective cap from the pH pen, immerse the pH water meter electrode in the solution, and then press the button to measure. Don't worry about not being able to see the displayed values clearly in low light. The tester is equipped with a backlit LCD screen to help you clearly view the measured values in any situation. 3. High precision: The high-precision algorithm chip and electrode of our tester's digital water quality pH can ensure an accurate and fast response. After the measured value is stable, simply press the HOLD/TEMP button to lock the measured value and take it out for viewing. It's really easy. 4. Automatic temperature compensation: Temperature can affect the reading level. The digital hydroponic pH meter has a better range from 0°C to 60°C (32°F to 140°F), so you can ensure optimal temperature compensation and be confident in any environment. 5. Multifunctional testing: The portable water quality meter can be carried anywhere to measure water quality, such as in hydroponics, drinking water, tap water, RO system water, aquariums, seawater, swimming pool water, etc.