The keyboard navigation of the Captcha is always available.
Kendo UI Captcha supports the following keyboard shortcuts:
||Selects/deselects the focused button.|
||Navigates to the next element of the Captcha.|
||Navigates to the previous element of the Captcha.|
||Increases the audio control volume.|
||Decreases the audio control volume.|
For a complete example, refer to the demo on keyboard navigation of the Captcha.