The ornamental design for a wirelessspeaker, as shown and described.
FIG. 1 is a front perspective view of a wireless speaker, embodying our new design;
FIG. 2 is a front elevational view of the wireless speaker of FIG. 1;
FIG. 3 is a rear elevational view of the wireless speaker of FIG. 1;
FIG. 4 is a right-side elevational view of the wireless speaker of FIG. 1;
FIG. 5 is a left-side elevational view of the wireless speaker of FIG. 1;
FIG. 6 is a top plan view of the wireless speaker of FIG. 1; and,
FIG. 7 is a bottom plan view of the wireless speaker of FIG. 1.
The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are included for the purpose of illustrating portions of the wireless speaker; the broken lines form no part of the claimed design.