“What is the square, two prong thing used for? It must be important since it has a special place in the case.”

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• The thing you're describing is a airplane headphone adapter jack. It is so you can listen to entertainment on a plane.

  Answered by Narsie 8 years ago

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• I believe you are referring to the earphones charging cradle. This is an essential component being that it is the only way to charge your earphones. The cradle connects to your earphones via magnetic ports and to the wall or power source via micro USB. Hope this helped.

  Answered by JoeJr 8 years ago

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• Hi Amac, that is a micro-USB cable used for charging the headphones. You may refer to page 11 of the link below for more information: https://docs.sony.com/release//Help_4590741111.pdf ~Ralph

  Answered by SonyListens 8 years ago

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