Mr Simo is an audio-nut, He has been making portable music machines since 2000 and drawn some inspiration from the man selling stereos and bumping his homemade Briefcase Stereo at the Flea Market in Sacramento. His latest products are the BoomCase: these beautiful vintage suitcases customized into Self Powered Portable Stereo system. Working with your iPod/iPhone or any device with a headphone plug. TheBoomCase will last 9+ hours on a single charge (Charger Included). In addition to running on batteries, The BoomCase can also be plugged in when the party goes inside. To save on weight, you can opt for a plug-in only version.