They usually don’t come with a bluetooth adapter. You can buy a bluetooth 4.0 adapter (the latest version) for about $10 on amazon. They are little USB dongles. Then get any bluetooth speaker you want.
Concur.. Neither of the sets I have bought came with an adapter. I bought something like this (as stated, $10 on Amazon):
http://www.amazon.com/IOGEAR-Bluetooth-Micro-Adapter-GBU521/dp/B007GFX0PY