Fivefunction water tester for versatile examination Measures pH, TDS, EC, salt, and temperature with a wide range and reliable accuracy to suit different assessment needs. Backlit display and power features Large backlit LCD screen with a green backlight for clear readings day and night. Powered by three LR44 batteries (not included); easy access to the battery compartment. Automatic powerdown after five minutes to conserve energy. Userfriendly and reusable design Simple operation with power, data hold, temperature conversion (C/F), mode switch, and calibration buttons. Easy to handle and suitable for repeated use; testing water is easier than using test strips. Durable, precise construction Robust housing designed to resist aging and provide IP67 water resistance. Quick and stable readings from a precision chip paired with titanium alloy sensors. Practical use scenarios Aquarium maintenance: monitor pH, salinity, TDS, EC, and temperature to keep a healthy tank environment. Hydroponics systems: manage nutrient solution quality by tracking pH, EC, TDS, and temperature for plant growth. Drinking water or pool/spa testing: assess water quality for safety and comfort by checking pH, salt content, and temperature.