1Multi Purpose: 7 in 1 water quality monitor is suitable for the determination of various values of water quality in drinking water, aquaculture, swimming pools, etc. 27 in 1: Water quality monitor has complete functions, can detect salinity, SG, pH, ORP and other values, and the functions can be switched at will. 3High Accuracy: The electrode of EC tester adopts Ti alloy probe, which has high measurement accuracy and accurate measurement value. 4LCD Display: ORP monitor adopts high definition display, large screen display, the value is clear and easy to read, suitable for testing needs of all walks of life. 5Small Portable: PH tester is compact in structure and light in weight, making it easy to carry and use when going out without taking up too much space.