This water temperature meter is designed for allowing you to easily control the temperature and give your families(babies, elderly people, etc.) a comfortable bath environment, avoiding being exposed to too hot or too cold water. Features: Built-in electricity generator, self generating power-supply, makes it need no batteries to work. High-precision temperature sensor, accurately measures the temperature of water ranging from 5°C-85°C with ±0.5°C error. It is easy to install and remove, with no tools required; 1/2 inch nut is compatible with most of the shower equipment. LED display, 360 degrees rotatable, easy to observe, shows the indicator light (blue/ green/ red) to help choose suitable water temperature. Digital shower thermometer, eliminates worry of the water being too hot or too cold before stepping into the water. Specifications: Material: ABS + PC Color: Silver & Black Screw Nut: 1/2in Temperature Display: °C/ ¨H Temperature Range: 5~85°C (41~185¨H) Measurement Accuracy: