Portable input/output device

FIG. 1 is a top perspective view of a portable input/output device;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left-side view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a front view thereof; and,

FIG. 8 is a back view thereof.

The dashed broken lines depict portions of the portable input/output device that form no part of the claimed design.

The dashed symbolic break and any portion of the cables between the dashed symbolic break form no part of the claimed design.