There are several ways to use the RadRadioButtonList via the keyboard only:
Set its TabIndex property and use the Tab key to navigate to the desired item and then press the Enter or Space key to select it.
Set its AccessKey property. This allows you to use the browser's shortcut combination to select the first item in the RadioButtonList ("Alt + AccessKey" in IE and Chrome, "Shift + Alt + AccessKey" for Firefox, "Shift + Esc + AccessKey" for Opera).
Note: By default, tab-access is disabled in Safari. To enable it, check "Preferences > Advanced > Press tab to highlight each item on a page".
Some browsers focus radio buttons in the same group when the arrow keys are pressed. Since such a feature is not implemented in RadRadioButtonList, you can get that behavior by using a
RadFormDecoratorto prettify the buttons:
<telerik:RadFormDecorator runat="server" ID="rfd1" RenderMode="Lightweight" DecoratedControls="RadioButtons" />