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Given an Amazon customer review, write a title for the review. The preferred titles are under fifteen words.

The mic and headphone jacks do nothing. Headphones work when used in PC itself when a Realtek window pops up. No such window appears on the keybaord. NO DETAILS about this AT ALL in the help files: the whole area is missed out by Logitech.<br /><br />Planning to take the keyboard back as not doing what it says it will on the box.<br /><br />This stuff should just work by now on modern kit with these expensive keyboards or at the least there should be proper help files with screenshots.
Output:
Some core features crippled