XSp.

Dunno how much of it is truth, but apparently Yorozu is a device that can turn anything into a speaker:

I don’t think the sound quality will be very good, but the device basically vibrates and you can attach it to different surfaces.
A normal speaker works the same way, only it has big magnets attatched to optimized materials to reproduce sounds with high quality.
Still, a nice alternative to take with you to places you can’t get a good speaker system.

Source: TechEBlog