｀Water Quality Tester TDS EC Meter Temperature Measurement Combo For Drinking BL
TDS: 0-9990ppm. 1 x YOUTHINK Water Quality Tester. Accuracy: ±2%. Conductivity: 0-9990μs/cm. If you are satisfied with our service, pls. HOLD FUNCTION: Press "HOLD" button to record the readings for further use.