The image is of a circle. The circle is composed of little circles that are connected by dashes in between each on that completes the circle. There is nothing in the center of the circle or on the outside of it.
This Bracelet icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,000 icons, all in the same style and quality.