Specifications: Material: Paper Size: 70*45*5mm/2.76*1.77*0.2" Instructions: 1. Just press the test strip on the object or liquid you want to test. Half a second later, take out and use the attached color map, compare the paper color changes, find out the paper acidity, test the level of the object. 2. When the density is less than 0.01%, the acid and alkali solutions can not be indicated. 3. Store in a dry and cool place Uses:  For testing many daily necessities, including moisturizing soap, lemon, juice, milk, liquid detergent, moisturizing soil, saliva, urine, sweat, etc. Usage:  Drop or dip the liquid to the PH test paper, and it can be reflected and displayed almost without waiting.  Then compare with the standard color card attached, the PH value can be obtained. Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement.