Perfect Shower Experience Every Time! No tools, easy to install and a warm connection between the faucet outlet and the shower hose, using international standard 4-point screws, compatible with most showers. Installation does not require any tools, tools such as wrenches can cause heat damage. Built-in waterproof gasket for manual tightening. Built-in water flow generator, no need for battery automatic power generation.360-degree rotating LED digital display allows you to easily monitor water temperature.High-precision temperature sensor accurately measures water temperature. The measurement range is from 5 °C to 85 °C with an accuracy of 0.5 °C. Suitable for standard 1/2 inch water pipes, shower hoses or hand showers. A home essential, to serve you and your family. Especially perfect for families having babies. Newest innovated technology to upgrade and modernize your bathroom. The built-in small-scale hydro power system makes it generate currents without any battery. After turning off the water, it’ll turn off current automatically.It can work better in any type of water supply(low-medium). Material: ABSPC Nut Size: Standard 1/2"Surface Treatment: PlatingTemperature Range: 5~85°C (41~185°F) WE SHIP WORLDWIDE!!!