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Thread Starter 

What is the use for these?

http://www.ebay.com/itm/3FT-3-5mm-1-8-Male-to-Male-Stereo-Audio-Jack-Cable-for-iPod-MP3-MP4-DVD-Green-/290765541701?pt=US_Audio_Cables_Adapters&hash=item43b2fa1145

 

I am going to buy this so I can hook my phone/iPod into an external speaker.

What other uses does this thing have?