Signal relay device

FIG. 1 is a perspective view of the front, right, and top sides of a signal relay device showing our new design;

FIG. 2 is a perspective view of the rear, left, and bottom sides 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; and,

FIG. 9 is a perspective view thereof shown in a state of use.

The broken lines shown represent unclaimed subject matter of signal relay device and form no part of the claimed design.