1、[6 in 1 Testing] These pH test strips can measure total chlorine, free chlorine, pH, total alkalinity, total hardness, and cyanuric acid, providing comprehensive analysis. 2、[Rapid and Accurate] Made with premium litmus paper, each pH test strip delivers fast, accurate, and reliable results in just a few seconds. 3、[Easy to Use] Simply compare the color change of the test strip with the corresponding color chart on the bottle to obtain accurate pH measurements. 4、[Versatile Application] These pH test strips are suitable for testing the acidity and alkalinity of human body fluids like urine and saliva, can also be used in schools, laboratories, swimming pools, fish tank, and more. 5、[100 Pcs in Total] This pack includes 100 test strips, ensuring prolonged use. The strips come with two storage bottles for convenient carrying.