7-in-1 pH Tester DigitalWater tester multi-function one-key switching,which is more worry-free and convenient to use.pH meter tester digital professional measurement ORP Meter/S.G Meter/TDS Meter/Salinity Tester/pH Meter/EC Meter/Temp. pH MeterThe pH tester digital mainly detects the pH value of liquids.Water that is too acidic or alkaline can adversely affect the health of humans or pet fish. APP Control pH meterpH tester digital accurate real-time Bluetooth data transmission and clear measured values make it easy for you to save,manage and share water ph tester of test data without worrying about data loss. Orp MeterThe ORP value is a measure of the oxidative power or sterilization strength in water pool salt. The higher the ORP value in water, the stronger the oxidative power and sterilization ability.In addition to being an ORP meter that can measure the ORP value of swimming pool water, the water tester can also be used as a TDS meter to measure the TDS value of the pool,and it can also be used as a salinity tester to measure the salinity value of the pool.It is a good helper for pool supplies. Family EssentialsTds meter as a tool to improve the quality of life.pH meter for water mini size,Lightweight and portable size allows you to take it around easily in your pocket and do your measuring anywhere. Basically all the environments that need to test PH value can use this tester to get accurate data.The ph meter for water can be applied to food,drinking water,wine,pool,aquarium.pet fish supplies,RO system, spa or hydroponics aquaculture.