To activate your Color Changing LED Acrylic Flower Rings, just turn the hard plastic flower clockwise. LEDs will slowly rotate from 1 color to the next. To turn off, turn flower counter clockwise. Ring is a comfortable silver plastic band – one size fits most. Dimensions: Height 1.63 in. Width 1.81 in. Flower Colors: Transparent LED Colors: 1 Blue, 1 Red, 1 Jade. Color Changing LED Acrylic Flower Rings include 2 replaceable CR927 Batteries.