Multifunctional: Tests water Tds value, EC, also has a function of measuring water temperature and ambient temperature (This product cannot test PH.) Large Digital LCD Display: With the large digital display, it's very easy to read the figure displayed on the LCD Accurate Measurement: Titanium alloy electrode, and strong antioxidant capacity, high detection, easy to measure, very accurate measurement (When using this product. The solution should not be runny. Flowing liquid affects the measured value.) Auto Stop Function: Low power, after 5 minutes, it will automatically stop working. More energy saving Usage: Ideal for testing water purifiers and filters, swimming pools and SPAs, aquariums, hydroponics.Batteries not included Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main image)