Use Alt + w focus the RadFloatingActionButton control.
Then you can leverage the keyboard support that is enabled by default. Here are supported keys and user actions:
- Enter or Space opens the speed-dial popup and moves the focus to first item or triggers click handler
- Up arrow moves focus to the previous item
- Down arrow moves focus to the next item
- Esc closes the speed-dial popup
- Home moves the focus to the first item
- End moves the focus to the last item