This little USB dongle is called the X-Tube and attaches to a USB port on your laptop to provide DTS sensation sound, ie, it replicates what surround sound would work like but uses just a set of headphones to achieve that.

When attached to a laptop it lights up blue when in use and has a couple of headphone jacks that allow you to connect up some (supplied) DTS headphones.

The X-Tube as the name suggests is actually a valve tube that can give out some decent sound. Valve tubes were the main way of amplifying sound a good number of years ago before most of you were born.

The X-Tube is available now, but only available in Japan, costing $45.

Via: CrunchGear Product Site

X-Tube Hanwa USB Dongle Gives DTS Sensation Sound