Skin treatment device

FIG. 1 . 1 is a perspective view of a skin treatment device, showing our new design;

FIG. 1 . 2 is a front view thereof;

FIG. 1 . 3 is a rear view thereof;

FIG. 1 . 4 is a left side view thereof;

FIG. 1 . 5 is a right side view thereof;

FIG. 1 . 6 is a top plan view thereof; and

FIG. 1 . 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the skin treatment device that forms no part of the claimed design.