Function: 1. 15 Seconds: Test a color change in 15 seconds, saving time and making it easy to carry for outdoor testing. 2. Colorimetric method: these PH test strips adopt the classic colorimetric analysis, multi-stage detection requirements, using colorimetric cards for visual reading. 3. Easy to use: Using pH test strips is a quick and easy way to check your pH levels and these pH test strips are easy to use. 4. Wide application: These PH test strips are widely used in urine, saliva, drinking water, laboratory, aquarium, gym, swimming pool, factory, etc. 5. 100pcs: One bottle contains 100pcs PH test strips, which can meet your different testing needs. Specification: Item Type: PH Test Strips Material: Paper Specification: 100 pieces / bottle Test site: pH value 0-14 Storage method: cool and dry place, avoid high temperature! Ph test purpose: Suitable for aquariums, swimming pools, spas, industrial water, drinking water, pond, hot spring water, etc. Recommended for: urine, saliva, drinking water, laboratory, aquarium, gym, swimming pool, factory, self-application Weight: Approx. 45g / 1.59oz Package List: 1 xPH test strips (100pcs / bottle) 1 x User Manual Note: Cover tightly after removing the test paper