Let the hive mind of Engadget get that for you.
"I am looking for a device that will stream sound from one source to several recipients. For example, I want to stream sound from my TV or stereo to my phone or MP3 player that has radio and Bluetooth capabilities. I have looked into radio transmitters and they seem like a decent choice, but I can't find one that uses external power (USB or from the plug) and I would want one with a transmit range of around 50 meters. Thanks!"
There should be a white label on the back or bottom of the box with bar codes on them. But a quicker way will to find out is to look at this picture. Does your box look like this?
http://www.circuitcity.com/IMAGE/product/enlarged/dtv/PC.DTV.H20.RT.JPG