Product Description: This kit can easily measure the PH hydrogen ion concentration contained in liquid (water). (Measurement range 4.0 - 10.0) 10ml reagent and 1 set of graduated cup Number of uses (1 drop = 0.04 ml)); Uses: For aquariums, free research, and other liquids; How to use: 1. Add the liquid (water) to the included cup. 2. Add 4 drops of reagent to the liquid (water) in the cup. 3. Shake until the color is uniform. 4. Compare and measure with the included color chart. ■ Caution / Please keep out of reach of small children. Please be careful not to get reagents on your eyes, mouth, and skin. In the event that it gets adhered, rinse it off with running water immediately. If there is any discomfort please consult a physician. Because the coloring power is very strong, please do not work near objects that may cause color to occur. Be careful of dropping anyone. When disposing, the color may be difficult to fade, especially in white washbasins, so please dispose while running it with water. Please do not leave it as is after finished working, and dispose immediately. Do not store in places exposed to direct sunlight or in places that are exposed to high temperatures. ·This product is not legal evidence. For personal use only. ·In case of defective product, please use non-claims or non-returns. Please note that we cannot be responsible for any accident, trouble or damage caused by the above precautions. Please purchase only if you use it correctly according to the precautions listed above.