Powerful sound supported by wireless music streaming via Bluetooth, a rechargeable battery for playback anywhere and a built-in microphone for hands-free phone calls. And a carabiner too, to clip onto your belt or bag. And it's available from Woot for just $32.99. It's available in Khaki, Blue, Green and Orange. You can grab it from the link down below.
Philips SBT30 SoundShooter Wireless Bluetooth Portable Speaker - $32.99 (Woot!)