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!"
Also, I wish the backup was silent on the client side (like RetroSpect) so my wife doesn't need to see a bunch of warning messages on her laptop if it was turned off overnight and not backed up. It should just proactively backup in the background.