With distinct color PH scale for result comparisons.The test strip color changes must be matched with the pH scale color chart within about 15 seconds.Quick and easy to use.Provides reliable and accurate pH readings.Easy to carry.Appropriate for testing alkaline or acid level of any liquid.Great product to have in every lab and to measure and inspect water quality, urine, saliva, soil, alkaline diet, aquariums etc.Scale Reads From 0 to 14:0 - 3 indicates a very acidic substance4 - 6 indicates an acidic substance7 indicates neutral8 - 11 indicates alkalinity12 - 14 indicates a very high level of alkalinityTotal length:. 500x1.3mmPH range: 0-14Usage:Take out a test paper.The 2 color blocks all immersed in the liquid.After 1 seconds to take out, in contrast to the color of the color reading value in .Note:Due to different production batches, there are differences in printing/appearance, which does not affect use.Colour:As ShownMaterial:PlasticPackage Contents:1 * PH MeterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.