Fangrui Product Details Professional-grade Digital Pool Water Tester Simultaneously Tracks 7 Parameters: Ph, Cl, Tds, Salinity, Orp, Ec, And Temperature. Ideal For Pools, Saltwater Aquariums, And Hot Tub Maintenance The Pool Thermometer Sensor Features A Patented Optical Sensor And Integrated Flow Sensor With Timed Active Detection. This Technology Provides Much More Reliable Results Than A Single Water Sample Or Test Strip Reading No More Guessing Pool Chemistry. The Digital Hot Tub Water Tester Provides Precise Data To Optimize Chlorine, Ph Stabilizers, And Salt. Reduce Chemical Waste, Save Money And Extend Other Equipment Lifespan Sync With The Free Tuya App To Track Trends Via Smart Water Monitor. Its Time To Leave The Pool Test Strips In The Past And The Pool Shop Too, Your Ultimate Pool Chemical Monitor For Hassle-free Maintenance Quickly Test Saltwater Pool Salinity, Hot Tub Ph Levels, Or Aquarium Tds With The Smart Water Monitors Timed Test . Accurate Notification Of Chlorine, Ph Or Salinity Imbalance Alerts To P