Package Contents: 1/2 inch nut Water thermometer *1 , waterproof gasket *1 , manual *1 ❤.Ultra-Practical Water Bath Shower Thermometer: with this thermometer, we can take shower with just right water temperature. ❤.High Precision Monitor: Built-in high precision temperature sensor, providing 5~58 C or 41~136℉ measurement range and ±0.5 C accuracy. Celsius/ Fahrenheit display selectable. ❤.Easy Installation: 1/2 inch nut, compatible with most of the shower equipment, easy to install without any tool needed. No Battery Needed: Built-in small-scale hydro power system to generate current, no battery needed or no power leakage risk. ❤.360 Rotating LED Temperature Display: Clear LED screen enables you to monitor the shower temperature in real time.The screen also displays the indicator light (3-Color Indicator Light-blue/ green/ red) to help you choose the suitable water temperature.