Feature: 1. The digital ph meter has many uses and is very suitable for testing the pH value of pure water, swimming pools, wine, hydroponics, etc. 2. This ph tester can read super fast and accurate, which is convenient for you to judge the data. 3. The entire measuring range of this digital phmeter is 0.0‑14.0 pH, and different data can be obtained. 4. Automatic temperature compensation: The ph tester will automatically adjust according to temperature changes. 5. This ph test pen is small and easy to carry, and can be used for testing at any time, with simple operation. Specification: Item Type: PH Meter.Material: ABS Purpose: PH value test Battery: LR44 button battery Battery Type: Lithium Battery 1-3: Highly Acidic Substance 4-6: Acidic Substance 7: Neutral 8-11: Alkalinity 12-14: Extremely High Alkalinity Package List: 1 x PH Testing Machine2 x PH Reagent1 x Slot Screwdriver1 x User Manual Note: The ph tester should be calibrated frequently, especially after long periods of non‑use.