Features: 14 heat 1 upgrade: detection of total alkali, pH, hardness, lead, copper, iron, mercury, chromium/hexavalent chromium, bromine, nitrate, nitrite, residual chlorine, fluoride, sulfite Health: Drinking test paper tap water, faucet, well water, fresh water tank and other water quality testing. Use professional healthy drinking water test paper to test water quality standards. Easy to use: Immerse the drinking water test strip in water for 5 seconds, keep it in the air for about 30 seconds, then adjust the color on the back of the bottle to get a reading. Drinking water test strips are easy to use, even for beginners. Environmental protection: Environmentally friendly PET material, easy to carry: about 14 cm long, about 7 ounces in weight, easy to carry. How to use:1. Dip the test strip in water for 5 seconds.2. Pick it up and wait 30 seconds.3. Compare the drinking water test paper with the color card on the bottle. Tips: Keep away from light and moisture. After removing the strap, put the cover on quickly. Do not remove the disinfectant Do not touch the test area of the reagent strip. Specifications:Packing list: 100 pieces x drinking water test strips.