If you want to be able to wear your headphones anywhere in your house without worrying about the headphones wire being too small or you tangling yourself in it if its too long than you sure need on of these.The ATH-DWL5000 is a state of the art digital wireless headphone system.
You can buy these headphones for the price of $1,149.99 if you have that kind of cash burning a hole your rich pocket.

You can see more specifications here.