Christmas star Single Functionality: The four hundred h Rich Water Tester integrates and temperature measurement, offering comprehensive water analysis for various applications With a inherent connection and advanced transducer technology, this tester is easy to use for novices and furnishes highly accurate measurements for consistent water assessment Wide Application Extentermeterror: Suitable for aquaculture, pool maintenance, and laboratory research, this tester meets both household and professional water needs Clear Displhello: A full resolution silhouetted screen, this device ensures easy reading of data even in shadowy conditions, enhancing user Accessible Hook Plannumber: Features a practical hook for easy installation and storage, saving space and ensuring the device is forever accessible for daily testing tasks, Manufacturer: RGYBAO