P.A.C.O. is a minimalist bluetooth speaker created by Italian studio Digital Habit(s). This is a stand-alone piece, it can be placed on a desk, shelf or any other surface. Here is how designers describe it:

P.A.C.O. is a digital loudspeaker manufactured in concrete and Fir Harmonic Board. The body, heavy and amorphous, enhances the deepness of bass and the harmonic wood gives warmth to the treble.

Aside from the bluetooth controls, the speaker can be operated via hand gestures. For example you can place and hold your hand over one side of the sensor to change volume. And to stop the music, you can just cover the sensor with your hand. Simple and intuitive.