If you are looking for some mobile speaker that you can bring anywhere, consider this.
The advantage: The JBL Micro Wireless Bluetooth speaker is a compact, hockey-puck-size speaker that has a built-in lithium ion rechargeable battery and offers good sound for its size. It also has an integrated line-in cable that stows away in the bottom of the device.
The unfavorable: Doesn't handle big bass well and distorts at higher volumes.
The offer: An attractive form factor and a good feature set give the JBL Micro Wireless a leg up in the tiny wireless speaker competition.
This is a slightly different class of speaker from the Jawbone Jambox. The Micro is truly tiny, a mono speaker not much bigger than a Christmas ornament that weighs in at a mere 4.48 ounces. While it doesn't deliver incredible sound, it does offer impressive sound for its size.
While you can certainly plug it into a laptop and use it in wired mode (or pair it wirelessly with a Bluetooth-enabled PC), the other big application for it is to pair it with a smartphone or tablet. It's definitely a significant step up over the internal speakers of an iPhone or an iPad and plays considerably louder and offers some bass, though not a lot.