Data Transmission Device

FIG. 1 is a front, top, right perspective view of a data transmission device;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front plan view thereof;

FIG. 5 is a rear plan view thereof;

FIG. 6 is a top elevation view thereof; and,

FIG. 7 is a bottom elevation view thereof.

The broken line in the drawings depicts a portion of the data transmission device that forms no part of the claimed design.