The updated version of the X-mini which features new ceramic drivers (supposed to improve sound quality, but I'm not an audio expert, so can't comment on this). Features improved battery life, and is a little heavier, so less likely to vibrate when in use. Comes with charging cable and carrying pouch.
Deal is for the gun metal finish of this speaker; all other colours seem to be more expensive.
Cheapest it's been for a while, according to camelcamelcamel.