No batteries↔? no wire needed.<br />It fits all standard connectors and easy to install.<br />The light is activated by water pressure and turns off automatically with the water.<br />7 colors are displayed circularly and gradually when water flow (the light colors are NOT affected by water temperature).<br /><br /><br />    Specifications<br />Product Details<br />	 Type: Shower Heads                                                  <br />                        Valve Core Material: ABS                                                  <br />                        Surface Finishing: Zinc Alloy                                                  <br />                        Weight: 0.22KG                                                  <br />                        Package Contents: 1 x Shower Head                                                	<br /><br /><br /><br />                                                <br />