These super portable speakers with great sound should find their place in the travel bag of a lot of notebook users.

Unlike most USB powered loudspeakers, the Logitec Z205 is a single, lightweight unit and small enough (at 180mm) that it looks clips comfortably onto the top of a notebook screen.
Logitech says nothing about the internal workings of this unit. There is no information on the power or frequency response, but it seems Logitech is using a so-called digital amplifier.

There also seems to be an imbalance in sound, but it’s definitely the best out there at the moment for the size and weight.