bluetooth connectivity connect to the pool thermometer via bluetooth from up to 230 feet away using your smartphonetemperature tracking view realtime and historical temperature readings on the easytouse mobile app with data exportable for up to 2 yearsfloating design the thermometer floats conveniently in swimming pools ponds aquariums and hot tubs for accurate water temperature monitoringlcd display check the current temperature directly on the thermometers lcd screenwaterresistant build durable construction protects the thermometer from water damage ensuring reliable performancesupport fahrenheit or celsius readings support temperature calibration through app2 aaa batteries required are included use the app to connect the floating thermometerscrew design easy to change the batteries when needed