Features: _x000D_It is compact, easy to carry and has a delicate appearance. _x000D_It can be used in swimming pools, hot springs, spas, any water you want to test. _x000D_Its measurement is accurate and you can use it safely.It will be your preferred water quality test. _x000D_Here is a simple, portable dual-use box containing PH and residual chlorine test fluids, as well as the corresponding colorimetric. _x000D_The operation is simple, you only need to spend a little time to complete the test, and get the test results quickly. The Numbers on the color card are clear and easy to see. You only need to use your hands and your eyes. _x000D_Specifications: _x000D_Condition:100% New _x000D_Material: Liquid wastes _x000D_Color: As shown in the picture _x000D_Size: Box: Approx.15cm/5.9in(L) _x000D_Application: Residual chlorine and PH test. The ideal range of residual chlorine in the pool water is 1.0-1.5 ppm; the ideal range for the pH of the pool water is 7.2-7.6._x000D_Usage: Residual chlorine: Rinse the colorimetric tube with water to be tested and fill it into the scale. Add 3 drops of residual chlorine reagent, cover the lid and shake it several times to compare the residual chlorine color card reading. _x000D_ PH: Rinse the colorimetric tube with the water to be tested and fill it into the mark. Add 3 drops of pH reagent, cover the lid and shake it upside down several times to compare the pH card readings.Package List: _x000D_1*Swimming Pool Water Test Box_x000D_1*PH Reagent_x000D_1*OTO Reagent_x000D_1*Test Bottle Set _x000D_Note: _x000D_When testing pH, if the residual chlorine content is higher than 3.0 ppm, you may get a wrong pH test result. In this case, reduce the residual chlorine content of the pool water before doing any other tests._x000D_Warning: Store in a place that is out of reach of children. Harmful if swallowed, may cause burning, store in a cool and dark place. In each beginning season, please use new solution to maintain accuracy. Please be at a depth of 40 cm below the water surface to take a water sample. 1It is compact, easy to carry and has a delicate appearance. 2It can be used in swimming pools, hot springs, spas, any water you want to test. 3Its measurement is accurate and you can use it safely.It will be your preferred water quality test. 4Here is a simple, portable dual-use box containing PH and residual chlorine test fluids, as well as the corresponding colorimetric. 5The operation is simple, you only need to spend a little time to complete the test, and get the test results quickly. The Numbers on the color card are clear and easy to see. You only need to use your hands and your eyes.