I'd highly recommend getting a tiny mp3 player (say Clip Zip, though they are now discontinued...) and a short light headphone cable. Why send audio wirelessly when the tech to play it is as small as the receiver?
There are also headphones with built in players, I don't know how the quality of those is though.
Why send audio wirelessly when the tech to play it is as small as the receiver?
Because you might want to stream audio from the Internet, or you don't want to waste time converting newer audio formats to MP3 and then copying them over, or you'd rather not have cables around you when you work out, or you might want to track what you've listen (particularly useful for audiobooks and long podcasts), etc.
Yes, these are not indispensable life necessities nor anything like that, but given the choice, I'd rather beam the audio from my tablet than carry an extra player.
Pretty much all the decent dedicated MP3 players have been discontinued. The last really great one for me was the Samsung's range (nee Yepp). But unfortunately the last one was the YP-U7 back in 2012 and it's very obvious they aren't going to make any more, even though they never announced it.
Sony still does players but they're not very good.
I hate wires with a passion. I don't what's wrong with me but I manage to tie, bust, wrap, tangle them in every most ridiculous possible wrong way all the time. I'm always sniping for multipairing mp3 capable headphones.
There are also headphones with built in players, I don't know how the quality of those is though.