• Maintain good health by testing the pH of common substances such as lemon juice, milk, hydrated soil, saliva, urine, and sweat. • Classify acidity: pH of 1 to 3 indicates high acidity, 4 to 6 is acidic, 7 is neutral, 8 to 11 is alkaline, and 12 to 14 is very high alkalinity. • Rapid color change: test strips change color in approximately 15 seconds for quick and reliable results. • Versatile use: ideal for cooking, gardening, personal hygiene control, and more, both for home and professional use. • Easy to use: dip the strip into the substance, wait a few seconds, and compare the color with the pH scale to get the result.