Easy Installation: 1/2 inch nut, compatible with most shower equipment, easy to install without any tools needed.With this thermometer, we can take a shower with the right water temperature, especially suitable for the family with babies. No Battery Required: Built-in small-scale hydroelectric system to generate power, no battery required or risk of power leakage. It will automatically shut down after no water flow. Memory Function: The screen also displays the indicator light (blue/green/red) to help you choose the appropriate water temperature. Built-in memory chip, tracking bathing time (up to 99 hours and 59 minutes). High-precision monitor: Built-in high-precision temperature sensor, providing a measuring range of 0~100°C and an accuracy of ±0.5°C. Celsius/Fahrenheit display selectable. 360° LED temperature display: Clear LED screen allows you to monitor the shower temperature in real time. 360° rotation for better viewing.