The EcoDrop by Ecoxgear provides surprisingly big sound 
In a compact and stylish package.  Great sound, long playtime, ultra-portable, and available in a variety of colors.
 
 
Features
Splashproof +Rugged
3W Speaker
Bluetooth Wireless Audio Connection for use with
      Smartphones  and other Smart Devices
5+ Hrs playtime
400 mAh rechargeable battery
Lanyard included