Features: 1. Working Principle: The TDS value of the water quality test pen represents the total soluble content in water, which can reflect the water quality. Usually the lower the TDS value, the less heavy metal ions and other soluble salts in the water, the purer the water quality. 2. LCD Digital Display: TDS water quality test pen with LCD digital display, more effective and intuitive, easy to read, accurate testing, rapid response. 3. Ti Alloy High Accuracy Probe: This TDS water quality test pen uses Ti alloy high accuracy probe, rust and corrosion resistance, sturdy and practical. 4. Test 3 Types of Impurities: The water quality tester can detect 3 types of heavy metal ions, such as zinc, copper, and other ionic organic substances; calcium ions, Mg ions and other soluble salts. 5. Indication Label: The TDS test pen has an indication label on the side, the test data can be compared with the indication label to understand the water quality condition. Specification: Item Type: Water Quality Test Pen Material: ABS, Ti Alloy Battery: 2 LR44 Button Cell (Included) Single Battery Capacity: 160MAH Weight: Approx. 54g / 1.9oz Package List: 1 x Test Pen 1 x Instruction Manual Features Enhanced Water Quality Testing: Measure the total soluble content in water with the TDS value, providing insight into water purity and heavy metal ion levels. Clear LCD Digital Display: Intuitive and accurate readings are displayed on the LCD screen for easy monitoring and analysis of water quality. Durable Ti Alloy Probe: The high accuracy probe is made of titanium alloy, ensuring resistance to rust and corrosion for long-lasting performance. Versatile Impurity Detection: Detect and analyze three types of impurities including heavy metal ions (e.g., zinc, copper), ionic organic substances, and soluble salts (e.g., calcium, magnesium). Convenient Indication Label: Compare test data with the indication label to quickly assess and understand the condition of water quality.