Mini Troll Turns Surfaces into Speakers

The Mini Troll portable Bluetooth speaker from Vibe-Tribe turns any surface into a 3D sound system. The Mini Troll is small enough to fit in a pocket, and provides up to four hours of audio on a single charge. The key to the device’s sound is its Resonance Core technology, which converts electromagnetic pulses to vibrations able to spread through any surface in contact with the device. This turns the surface into a powerful speaker able to project sound 360 degrees.
http://www.vibe-tribe.it/en/prodotti-2/mamba.html