Pefectly portable.
If you're looking for a compact speaker system on a budget, you'll be hard-pressed to find a system this small that sounds this good for such a low price.

A highly packable, budget-priced, battery-powered speaker system compatible with all past and present iPod models thanks to a unique folding and expanding design.

Very good sound for the price, includes metal grille guards and a simple carrying sleeve for safety during travel.