Add button on text widget on homepage

Hi support,

Could you let me know how to add a button for the phone number in this section? We want it to look like the Extra Header Widget below the slider.

Thank you,

website URL:

Add this HTML code when Text mode of editor is enabled.

   <h1><a class="roll-button button-slider" href="tel:+1 (866) 571-2666">+1 (866) 571-2666</a></h1>