larger sibling boasts four times as many drivers (eight instead of two) and costs just $50 extra. But then we gave this more suitcase-friendly version a whirl and discovered that it's actually loud and balanced enough to do some justice to your tunes while you're on the move. In fact, it could well make a smarter purchase than those $30 speakers you keep buying in airports and then deliberately losing. It's available from the end of this month, works with any A2DP Bluetooth-equipped smartphone or tablet and incorporates a mic for handling calls -- plus its rechargeable battery is claimed to last up to ten hours. Ears-on video and a quick round of 'name that tune' right after the break, along with the full PR.