Measures at just 24mm x 24mm, the Ultimate Smallest MP3 Player is obviously the tiniest fully-functional digital audio player in the world. It has a built-in FM radio tuner and can play a bunch of popular audio formats, including MP1, MP2, MP3, ASF, WMA, and even WMV. Nice, huh? Don’t expect a viewscreen or any media card slot though, as its small body won’t fit anymore enhancement. The good thing is, you’d get a 2GB of storage which is enough for hours of dancing.

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