Charge up Greenhouse's rotating speakers via USB and they give you eight hours' of sounds when you clip them on to your fifth-gen iPod. With an output of 770mW x 2, the GH-SPA214CC costs $44 and will be out in Japan at the end of the month. A bigger version of Greenhouse's speaker-n-case combo earlier in the year, they're a pretty neat way to bug people on public transport. [Impress]
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