High-precision monitor: The built-in high-precision temperature sensor has a measuring range of 5 to 85 °C and an accuracy of ±0.5 °C. No batteries required: A built-in small hydroelectric power generation system can generate power without the need for batteries. It will automatically close when there is no water flow. Rotating LED temperature display: The clear LED display allows you to monitor the shower temperature in real time. Rotate 360 ° for a better viewing effect. Easy to install: 1/2 inch nut, compatible with most shower equipment, easy to install without tools. Super practical shower thermometer: With this thermometer, we can take a shower at the right water temperature, which is especially suitable for families with babies.