Ultra-practical shower thermometer: with this thermometer, we can take a shower with the right water temperature, especially suitable for families with babies. High precision monitor: high-precision integrated temperature sensor, providing a measuring range of 0 ~ 100 C and an accuracy of 0.5 C. Display Celsius / Fahrenheit selectable. Easy installation: 1/2 inch nut, compatible with most shower equipment, easy to install without any necessary tools. 360 LED temperature display: a clear LED display allows you to monitor the shower temperature in real time. 360 rotation for better viewing. No battery required: small-scale integrated hydroelectric system to generate current, no battery required or risk of power leakage. It will turn off automatically after no water flow. Material: ABS + PC + copper wire, size: 8.1 * 8 * 3cm, Fit Nut Specifications: International 4 points (1/2 inch) Features: 0-100 degree temperature display, can be installed on the left and right of the screen, with water outlet time calculation, with blue, green and red three colors Tip: Green is the most suitable for water temperature (with instruction manual)