Features: The Digital Salinity Tester offers precise measurement capabilities for salinity, TDS, and temperature, ensuring excellent water quality management in saltwater pools and fish pond. Featuring a waterproof design, this tester is sturdy and reliable, with a large, easy to read display and automatic calibration for user friendly operation. Ideal for home users, outdoor enthusiasts, aquariums hobbyists, and laboratory technicians who require accurate water quality assessments. Perfect for testing household tap water, monitoring water quality in aquariums, analyzing water sample in laboratories, and evaluating water sources during outdoor campings. With its practical design and comprehensive functionality, the tester is a essential tool for anyone needing precise and convenient water quality analysis. Specifications: Component:Plastic Size:Approx,15.2x3.1cm/5.98x1.22inches Package Includes: 1Pc Digital Salinity Tester note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color. Thanks!