While many compact music systems claim to be portable, It is hard to find one that is truly comes handy: they are small however not enough to be carried around in our pocket or hand without obstacles. Unless, it is the POPBOX, a true pocket size music amplifier. Thinner than a quarter inch once collapsed, POPBOX is more compacted than any other portable speakers or amplifier on the market. POPBOX, the collapsible smartphone amplifier, is designed based on the sole believe that active music lovers (like us), should always be able to bring the music on the go.