LED 7 Color Changing Rainfall Round Bathroom Shower Head ABS Chrome Surface No battery or power line; LED light will light up when you turn on the tap;activated by water pressure and turns off automatically when water is shut off Gradient color option: 7 colors (red,orange,purple,blue,green,lime,yellow) that changes every 4-6 second Mix color option: 7 colors (red,orange,purple,blue,green,lime,yellow); 3-4 colors will light up within 1 second Shower head that is both practical and stylish ABS chroming material; excellent corrosion resistance & durability