Features: 1. Accurate measurement, rust‑proof titanium alloy probe, high accuracy, no magnetic interference, to ensure the correct value. 2. Multi‑purpose detection pen, TDS+EC two‑in‑one function, it is more convenient for one‑stroke dual‑use. 3. Easy to install, installation is very easy and convenient, convenient for your use, very convenient. 4. Suitable for measuring drinking water, aquaculture, swimming pools, laboratories, agriculture, irrigation water, etc. 5. Durable, made of high‑quality ABS material, wear‑resistant, and can be used for a long time. Specification: Item Type: Soil Tester Pen Material: ABS Weight: Approx. 34g / 1.2oz Product Size: Approx. 15x1.8cm / 5.9x0.7in Battery Attributes: 2 x LR41 button batteries (shipped without batteries) Test Accuracy: ±2% Test Range: EC conductivity 0-9990um/cm TDS: 0-9990ppm Temperature: 0.1-80℃ Celsius, Fahrenheit 32.0-176.0℉ Application: TDS function can be applied to drinking water, aquaculture, swimming pool, laboratory, rice field, irrigation water, etc. EC function can be applied to greenhouse planting, horticultural planting, farmland planting, laboratory, agriculture, etc. Package List: 1 x TDS&EC Detection Pen Features Accurate Measurement: Ensure precise readings with the rust-proof titanium alloy probe, providing high accuracy and eliminating magnetic interference for correct results. 2-in-1 Functionality: Enjoy the convenience of a multi-purpose detection pen with TDS+EC dual-use capability, allowing for seamless and efficient testing. Easy Installation: Experience hassle-free setup with a user-friendly design, making it quick and convenient to install for immediate use. Versatile Applications: Perfect for measuring water quality in various settings including drinking water, aquaculture, swimming pools, laboratories, agriculture, and irrigation water. Durable Construction: Made from high-quality ABS material, this tester is wear-resistant and built to last, ensuring long-lasting performance and reliability.