1. 4-in-1 Water Tester: This water tester combines a salinity meter, TDS, EC, and temperature function. It provides comprehensive water quality measurement, ensuring a healthy environment for aquariums and other applications, meeting all your testing needs. 2. Simple Operation and Switching: Simply remove the protective cap from the digital pH tester, immerse the electrode, and press the button to measure. Switching with the simple press of a button allows you to easily manage your water quality, ensuring safe and healthy drinking water. 3. Portable and Versatile: Compact and easy to carry, this TDS/EC/SALT/TEMP meter is ideal for outdoor use. Perfect for water quality experts, adventurers, and campers, it is suitable for swimming pools, laboratories, aquariums, and other environments, promoting a healthy lifestyle.