The ornamental design for a visor for a headset, as shown and described.
FIG. 1 is a front perspective view of a visor for a headset showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is a front perspective view of the visor for a headset of FIGS. 1-8 shown with selected disclaimed features removed for clarity;
FIG. 10 is a rear perspective view thereof;
FIG. 11 is a front view thereof;
FIG. 12 is a rear view thereof;
FIG. 13 is a left side view thereof;
FIG. 14 is a right side view thereof;
FIG. 15 is a top view thereof; and,
FIG. 16 is a bottom view thereof.
The broken line showing of the remainder of the visor for a headset is for environmental purposes only and forms no part of the claimed design. The figures feature transparent visor portions through which other features are visible. FIGS. 9-16 show the visor for a headset of FIGS. 1-8, with selected disclaimed features removed for clarity.