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!"
None of these devices spit out an instrument level that correct for plugining into a guitar amp.
You can do it and it'll work and itl sound awfully distorted and lame because the impedance is very wrong. This thing spits out what a VOX AC-30 wants to see. Zooms dont.