The ornamental design for headphones, as shown and described.
FIG. 1 is a side perspective view of the headphones with adjustable earpieces and opaque top speaker and earpiece panels, depicting the left and right earpieces in retracted position showing our new design;
FIG. 2 is a side perspective view of the headphones shown in FIG. 1, depicting the left and right earpieces in extended position;
FIG. 3 is a side perspective view of the headphones shown in FIG. 1, depicting the left and right earpieces in retracted position and showing the left earpiece panel in open position;
FIG. 4 is a front perspective view of the headphones shown in FIG. 1, depicting the left and right earpieces in extended position and showing the left and right earpiece panels in closed position;
FIG. 5 is a front perspective view of the headphones shown in FIG. 1, depicting the left and right earpieces in retracted position and showing the left and right earpiece panels in open position;
FIG. 6 is a front perspective view of the headphones shown in FIG. 1, depicting the left and right earpieces in retracted position and showing the left and right earpiece panels in closed position;
FIG. 7 is a side perspective view of the headphones with adjustable earpieces and transparent top speaker and earpiece panels, depicting the left and right earpieces in retracted position showing our new design;
FIG. 8 is a second side perspective view of the headphones shown in FIG. 7; and,
FIG. 9 is a top perspective view of the headphones shown in FIG. 7.
The broken lines form no part of the claimed design.