FIG. 1 is a perspective view of a set of headphones as seen from the front, bottom and right side;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The dotted line portions of the drawings represent environmental structure only and do not form part of the claimed design. The set of headphones is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.