If you like to turn your music up loud, this hidden speaker ($150) is nothing more than an over sized volume knob, capable of pumping out over 80 dB of sound. It’s no bigger than your fist, is Bluetooth wireless, provides up to 30 hours of playtime on a single charge (via a 3.5mm input), and includes an internal AM/FM radio tuner.
The way it works, is you lift the cap from the speaker, and the higher it rises, the more sound is amplified, and the louder it gets. It offers 360 degree sound delivery technology, so one speaker is all you’ll need. The only drawback we can see from its design, is there is no display to see which radio station you’re tuned into, but we can live without that.