Features: FAST, RELIABLE AND EASY TO USE - Just dip in the meter, stir, and get your results in seconds. No calibration or setup needed, you can use it straight out of the box. Follow the step-by-step instructions then check the easy-to-read screen. UPGRADED ACCURACY THAT LASTS - With the titanium alloy probe and the latest sensors, you can get almost exact readings every time. What's more, the meter can be easily recalibrated for extended precision whenever needed. SUITABLE FOR ANY TYPE OF TDS OR EC TESTING - Check the TDS or EC of your aquarium, pool, or any water source. You can determine the effectiveness of your RO, DI, or distillation unit, check the nutrient levels of your hydroponic setup, and more. ACCURATE AND RELIABLE- To achieve high accuracy, equipped with premium quality titanium alloy probe, and reliable Automatic Temperature Compensation ATC ensures reading always be accurate at various temperatures. EASY TO USE-Just turn TDS meter on and stir water gently, then stabilized readings will be auto-locked on LCD in seconds, which will be displayed on the screen in ppm parts per million Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Description: Material: ABS shell electronic components Size: 154X30X14mm PH pen High precision 0.01 2-point automatic calibration ATC automatic temperature compensation EC pen Accuracy ±2 Test TDS value Detect temperature Test conductivity ATC automatic temperature compensation Package List: 1xPH Pen 1xEC Pen 1xInstruction Manual