FIG. 1 is a front perspective view of a data transmission device showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a side view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is the other side view thereof; and,
FIG. 8 is a sectional view through FIG. 1 as indicated.