Maxbell Mi Digital Drinking Water Purity Quality Tester Kit Pen Tds Measurement Detector Meter Waterproof (Battery Included) - Product Features
- Detect the purity of the water by just putting the purity tester in water
- High Precision Anti-rust and Anti-corrosion Metal TDS Probe
- Reacts to organic compounds, heavy metals and soluble salt content
- Please refer the chart given in 4th image alongside
- Comes with 2 replaceable button batteries