Together with Piet Hein Eek, LEFF amsterdam came up with the idea that if you have a clock on your bedside cabinet, then a speaker might be nice alongside it. So they designed a bluetooth speaker in the same shape as the tube clock. You can connect the speaker to your mobile phone, tablet, etc. via bluetooth and listen to your favorite music. The tube audio has the best components available and gives an extraordinarily good sound for such a small object.