RadDropDownButton can I set an Image?

Hi, I am trying to use a RadDropDownButton inside a RadToolBar control.

I need to display an image on the RadDropDownButton, the same way I can with a regular button like the example below:

<Button Name="btn_ONLINE">
                <StackPanel Orientation="Horizontal">
                    <Image Source="/Images/OnLine2Red24.png" />
                    <TextBlock Text="Offline" Margin="5,0,0,0" />
                </StackPanel>

</Button>

Is there any way I can achieve the same result?

Thanks,