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 off after no water flow. Memory function: the screen also displays the indicator light (blue/green/red) to help you choose the suitable water temperature. Built-in memory chip, keeping track of swimming time (up to 99 hours and 59 minutes). High-precision monitor: Built-in high-precision temperature sensor, providing a measurement range of 0~100C and 0.5C accuracy. Selectable Celsius/Fahrenheit display. 360LED Temperature Display: Clear LED display allows you to monitor the temperature real-time shower temperature. 360 rotation for better viewing.