These cylindrical, bullet shell looking like device is actually an MP3 player that can double as a speaker. It's about 3 inches tall, 1.3 inches in diameter, supports microSD and plays MP3, WMA, APE, etc.
The speakers that come in the Singbox SV-606 are just mono, so you're not going to get any real punch behind it (which is not unexpected given the size, I guess) so you'll probably have to plug in some headphones. I wish it looked more like a bullet shell though. [NovelView via Akihabara News]