AMC Battery-less, Water-powered LED Shower Head that Lights Up, Mix Color 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