It might look like a monstrous set of headphones, but the WHILL is actually an electric drivetrain designed to clamp onto manually powered wheelchairs, temporarily giving them a powered boost when longer distances have to be traveled.
The prototype�which was recently demonstrated at the 2011...
Source:
http://gizmodo.com/5866915/clamp-on-whill-temporarily-gives-manual-wheelchairs-electric-drive
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