1. This pH meter for water combines 4 essential functions: pH, ORP, hydrogen (H) concentration, and temperature. Ideal for daily drinking water testing, it's a must-have for health-conscious families who want to monitor water quality with ease and accuracy. 2. Hydrogen-rich water contains active hydrogen molecules that neutralize harmful free radicals. It supports boosts metabolism, and improves immune function. Regular consumption can help alleviate fatigue and promote better cellular health. 3. Studies show that slightly alkaline water (pH 7.0-8.5) helps balance body acidity, enhances hydration, and promotes overall wellness. With 0.01 pH resolution, this digital pH ORP tester ensures accurate monitoring, helping users avoid acidic water risks. 4. Supports 3-point calibration (pH 4.00 / 6.86 / 9.18) and built-in automatic temperature compensation (ATC) for reliable readings under varying temperatures. Perfect for kitchens, water bars, offices, or anywhere water is consumed daily. 5. The bright LCD backlight makes readings clear even in low light. Compact and portable with a hook for hanging, it's user-friendly for seniors, kids, and busy households. Maintain your family's hydration safety, whether or . Note:Ordinary tap water has almost no hydrogen, so the test result is 0. Only the prepared hydrogen-rich water can be tested, and the device display the hydrogen value normally. Color:As Shown Material:plastic Package Contents: 1 * 4-in-1 Digital Water Meter 4 * Calibration powder 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.