Checking the quality of drinking water will only take 35 seconds with the test strips.Drinking water is essential in our life. Contaminated water could cause many health problems, so it is important to regularly test the quality of drinking water. -Test 14 parameters at the same time:Total alkalinity.pH.Hardness.< br/>Lead.Copper.Iron.Mercury.Chromium / Chromium (VI).Brome.Nitrates. Nitrites.Residual chlorine.Fluorine.Sulphite.--Easy to use: 1. Immerse the test strip under water for 5 seconds. 2. Take it out and wait 30 seconds. 3. Compare the color of the drinking water test strip with the color chart on the bottle. -Includes:1 pack of 100 drinking water test strips. -Notes:Keep away from light and moisture.Quickly close the cap after removing the strips.Do not remove the desiccant packets.Do not touch the testing area of the test strip.