Comprehensive 5in1 water tester for pH, TDS, EC, salinity, and temperature Key benefits Allinone measurement: simultaneously tests pH, TDS, EC, salinity, and temperature in a single handheld device. Clear visibility in any lighting: VA backlit display provides easytoread results, including at night. Hands monitoring: voice broadcast announces water quality readings for convenient, safe use. What it does Versatile applications: ideal for drinking water quality testing, swimming pool quality monitoring, pH balance measurement in RO/DI systems, aquariums, spas, hot tubs, and hydroponics. Precise and reliable: pH resolution 0.01 with an accuracy of ±0.05; TDS and EC ranges up to 9999 with precision. How it works Easy operation: remove the digital pH tester's protective cap, immerse the electrode, and press the measurement button to obtain a reading. Onebutton switching: quick and effortless mode changes to manage your water quality checks efficiently. Specifications at a glance Functions: pH, TDS, EC, salinity, temperature Display: VA backlit screen for clear readings pH: resolution 0.01, accuracy ±0.05 TDS/EC: ranges up to 9999 ( precision) Additional features: voice broadcast for audible readings Practical use scenarios Home and drinking water quality: verify tap or filtered water quality and monitor RO/DI systems to maintain safe drinking water. Pool, spa, and hot tub maintenance: regularly check and adjust water chemistry to protect users and equipment. Aquariums and hydroponics: monitor pH and nutrient solution conductivity to sustain healthy ecosystems and optimize plant growth. Notes Protective cap is used to shield the electrode when not in use. Designed for straightforward operation and consistent, trustworthy results across diverse settings.