Test range: TDS:0-9990PPM Error: ± 2% Battery: 2*15v Size: 2020*150mm Weight: 23g Specifications: 1. Data measured in one second: using high-quality chips and integrating algorithm data close to industrial precision instruments 2. Top-quality appearance mold: high-quality PVC particles are used in the product shell, and impurity waste materials are rejected. 3. High-precision detection: TDS value error is small. TDS value represents the total soluble solid content in water. The lower TDS value, the less ion content in water and the higher the purity of water. 4. Precision probe: highly sensitive probe ensures accurate data, avoids interference by magnetic field in water when detecting water quality, and reduces errors Package Included: 1 * water quality testing pen