1High Quality: The residual chlorine detector adopts a high quality ABS case, which is waterproof, comfortable, durable, sturdy, and has a long service life. 2Easy to Read: The screen displays the test results of pH value and chlorine content, and the reading is convenient and accurate. 3High Accuracy Chlorine PH Tester: 7.27.8ph detection range, 27ppm chlorine detection range. It is suitable for homes and spas to detect chlorine and PH value. 4Easy Operation: Chlorine PH detector requires no chemicals or guesswork and is simple to operate to obtain accurate values. It is easy to carry and light in weight. 5Widely Application: The water quality tester is suitable for many places. Can be used at home, swimming pool, spa, hot springs make your water safe, comfortable and corrosion free.