If you've ever found yourself in need of a pen but unable to find one, then this iPhone pen accessory might just be what your looking for.
The 'Jack Pen' is a small ball point pen that you insert into your headphone jack when not in use. Whenever you need to put your John Hancock on a document you simply pull out your pen via the grip that sticks out ever so slightly from your jack, turn the pen around and insert the grip back into your audio jack. Congratulations you've just turned your iPhone into a pen.
Now with your new iPhone pen you are free to write and sign as you please. No longer must you carry both a cell phone and a pen, you are now a modern man or woman.