4in1 Multifunction Water Quality Tester: This portable water quality tester not only measures total dissolved solids (TDS), but also tests electrical conductivity (EC) and temperature, providing a comprehensive water quality test. Suitable for drinking water tester and aquarium water quality test kit needs Customer Satisfaction Guarantee: We offer a 2year warranty to give you peace of mind. Our 4in1 TDS meter digital water quality tester is designed to meet a variety of water quality testing needs, and we are committed to providing reliable services and products. Instant and Easy Functionality: Simply start the drinking water TDS tester, immerse it in water, and quickly get an accurate reading. The autooff feature turns off the tester after two minutes of inactivity, saving battery life, making it both efficient and easy to use. Accurate and Reliable TDS Meter: Our 4in1 TDS meter digital water quality tester uses highquality titanium alloy probes and advanced internal technology to ensure stable performance and excellent accuracy. Ideal for reliable water quality testing in a variety of applications, including drinking water, aquariums, swimming pools, and hydroponics. Easy to read backlit LCD display: This digital water hardness tester is designed with a large backlit screen, which allows you to read the values clearly even in low light conditions. The automatic lock function retains the results for you to view at any time, ensuring that you will not miss any measurement results.