I claim the ornamental design for a wearable stimulation device, as shown and described.
FIG. 1 is a perspective view of a wearable stimulation device of the claimed design;
FIG. 2 is a front view of the claimed design shown in FIG. 1;
FIG. 3 is a rear view of the claimed design shown in FIG. 1;
FIG. 4 is a left side view of the claimed design shown in FIG. 1;
FIG. 5 is a right side view of the claimed design shown in FIG. 1;
FIG. 6 is a bottom view of the claimed design shown in FIG. 1; and,
FIG. 7 is a top view of the claimed design shown in FIG. 1.
The ornamental design that is claimed is shown in the drawings as solid lines and surfaces having surface shading. In the drawings, the broken lines depict environmental subject matter only and form no part of the claimed design.