Feature: 1. 15 Seconds: Test color changes within 15 seconds, saving your time and easy to carry for outdoor testing. 2. Colorimetric Method: These PH test strips adopt classical colorimetric analysis, multistage detection requirements, using colorimetric cards for visual reading. 3. Easy Operation: 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 Applicability: These PH test strips are widely used in urine, saliva, drinking water, laboratory, aquarium, gym, swimming pool, factory, etc. 5. 100 Pieces: One bottle contains 100 pieces PH test strips that could meet your different needs for testing. Specification: Item Type: PH Test Strips Material: Paper Specification: 100 Pcs/Bottle Proving Ground: 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 x PH Test Strips (100Pcs / Bottle)1 x User Manual Note: After taking out the test paper, cover tightly