Just in case the semi-mysterious specifications and launch deets we had last week for SanDisk's Sansa Shaker have been keeping you up nights, here's the skinny. The Shaker, which just went "official," includes the dual headphone jacks, built-in speaker, 512MB of memory and SD card slot we told you about. What we weren't clear about is the "interactive Shake feature," but it turns out it merely skips to the next track, and there's nothing stopping your child from controlling playback with the control band at the bottom of the device -- no need for physical exertion when a twist will do, right? SanDisk plans to launch this puppy in the US for $40 by late April, with the rest of the world to follow later this year.
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