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 Screen: With the large digital display, it's very easy to read the number displayed on the LCD screen Precise Measurement: Titanium alloy electrode, and strong antioxidant capacity, high detection, easy to measure, very precise measurement (When using this product. The solution should not be runny. Flowing liquid affects the measured value.) Automatically Stop Function: Low power, after 5 minutes, It will automatically stop working. More energy savings Usage: Ideal for testing water purifiers and filters, swimming pools and SPAs, aquariums, hydroponics.