No batteries, no wire needed.Color changes according to the temperature of the water running through itShowerhead changes the color of the water coming out by using built-in LEDsLow flow.water conservation with a unique fun & soothing experienceThe showerhead handle connects directly into your shower pipeThree outlet modes: Normal outlet, Atomizing spray outlet & Center column outletMake the flowing into a crystal clear sheen freely, your bathing room will become a dreaming-world with sparking.Feature:When water temperature below 31ï¾°C, green color will show automaticallyWhen water temperature is between 32ï¾°C ~ 43ï¾°C, blue color will show automaticallyWhen water temperature is between 44ï¾°C ~ 50ï¾°C, red color will show automaticallyWhen water temperature is above 51ï¾°C, red color will flash immediately for alert.which means that the water is too hot and please be carefulSpecifications:LED lighting color: Green/Blue/RedCasing material: ABSSurface treatment: ElectroplatingCasing color: metallic colorNet weight:182gPackage weight:234gItem size: 22 * 7.5 * 3.5cm (Length * head diameter * handle diameter)Package Included:1x Temperature controlled led shower headNotice:1. Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid.2. The colors may have different as the difference display. Pleases understand.