Japan-based design and gadget company fu-bi has announced the so-called “Retro Cube Mini Speaker With MP3 Player” [JP] today, and as the name of the device suggests, it’s a one-unit speaker (3W×2ch) with a built-in MP3 player. You can connect it to your iPod or PC via USB 2.0 and listen to three hours of music after charging the internal battery for about an hour.

It’s possible to listen to music coming directly from a USB stick, MMC card or SD/SDHC card (up to 4GB), too. You can choose the tracks with a mini remote control that comes with the device.

fu-bi started selling the Japan-only retro cube speaker today (price: $50). I suggest you contact the Japan Trend Shop or Geek Stuff 4 U in case you live outside Japan and you’re interested in getting one.