thanks for asking.

You can be sure that this UIA-11 receiver works with Remote Buddy if 
it is or was part of a: 
- Remote for iTunes bundle 
- Express bundle

For the Digital Media Remote bundle, this can be an older, rare 
revision that can't be supported by Remote Buddy for legal reasons. 
To get certainty in that point, ask the seller for the USB Product 
and Vendor ID (he can find out easily via the OS X System Profiler) 
and compare them with those in the table on the "Supported Hardware" 
page. If they don't match, it's the old, rare revision. If they do 
match, that receiver will work with Remote Buddy.

Hope that helps.

Best regards, 
Felix