Bluetooth speakers come in a variety of weird and wonderful shapes and sizes, but few are like the OM/One-- a spherical speaker makers OM Audio describe as "the world's first levitating Bluetooth speaker."
Essentially the OM/One consists of a 9cm diameter orb. It carries a "finely tuned" 75mm audio driver, and levitates when in contact with a companion magnetic base.
Levitation height totals around 3cm, and one can carry the orb speaker around for portable spherical audio.