High Accuracy Monitor: Built-in high accuracy temperature sensor for 5~85C measurement range and 0.5C accuracy. Easy to install: 1/2 inch nut, compatible with most shower equipment, easy to install without tools. Handy Shower Thermometer: Thanks to this thermometer, we can take a shower with just the right water temperature, which is especially suitable for families with babies. No Equired Stack: Built-in small hydroelectric system to generate electricity, no battery needed or power leakage. It automatically shuts off when there is no water flow. 360 rotatable LED temperature display: The clear LED display allows you to monitor the shower temperature in real time. 360 can be rotated to get a better view.