1. 4in1 Precision Water Quality Tester – This TDS Meter Digital Water Tester accurately measures Total Dissolved Solids (TDS), Electrical Conductivity (EC), and water temperature (°C/°F). Featuring a large backlit LCD, it ensures clear readings at any angle, even in lowlight conditions. Red backlight (TDS >40 ppm) indicates nondrinking water, while green backlight (TDS ≤40 ppm) signals safe drinking water. 2. Automatic ShutOff Hold Function – The TDS Meter automatically powers off after 2 minutes of inactivity, preserving battery life. The hold function locks in readings for convenient recording, making it an efficient and userfriendly water tester for various applications. 3. Precision Sensor for Reliable Accuracy – Equipped with a titanium alloy probe and an intelligent microchip, this TDS Meter Digital Water Tester provides stable and precise measurements. Its cuttingedge technology ensures accuracy in water testing for drinking water, aquariums, and hydroponic systems. 4. Wide Measuring Range for Multiple Uses – This TDS Meter measures from 0 to 9990 PPM with a resolution of 1 PPM (0999) and 10 PPM (10009990), displayed with a blinking '×10' symbol. Ideal for testing tap water, well water, pools, hot tubs, aquariums, hydroponics, RO/RODI systems, and more.