Like a lantern of sound, The Speaker by Balmuda sends its output in all directions. Its 3-inch full-range driver sits atop an organic glass tube, using the air inside like a spring to boost bass response. Also inside the tube are LED lights housed in vacuum tube-like enclosures that can react to the music playing in real-time, either at full synchronization, at a gentler pace, or instead replicate the flickering of candlelight. Its rechargeable battery is good for up to seven hours of playback, and Bluetooth and 3.5mm aux inputs ensure compatibility with most audio sources.