The OontZ Ultra-Portable Wireless Bluetooth Speaker by Cambridge SoundWorks
For it's price its ok.  I purchased this to listen to music at my desk using my phone.  Charging and listening to music seems to be problematic.  Bluetooth drops when power is very low; obviously.  But plugging USB in to PC or outlet causes static sound and no music.  Trying to use headphone jack relates to similar issues.  If it is charged it works well.  it has good sound for its size.