Signal Circle icon

<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke-width="1.5" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12a9 9 0 1 1-18 0 9 9 0 0 1 18 0M9 13.5v-3m3 4.5V9m3 4.5v-3"/></svg>