Data Transmission Device

FIG. 1 is a front perspective view of a data transmission device showing the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The even-length broken lines shown in the drawings illustrate portions of the data transmission device that form no part of the claimed design.