Insignia Description
A silver color metal and enamel device 1 1/4 inches in height overall consisting of a silver barbed arrowhead, the tip conjoined with orange enamel flames issuing at base from each side of arrowhead, a lightning bolt superimposed in black enamel.

Symbolism
The one bolt of lightning alludes to communications and to the numerical designation (one) of the organization. The barbed arrowhead with superimposed lightning bolt refers to both the tactical and strategic support mission of the organization. The flames allude to fire being the oldest source of signal communication at a distance and thus the first, the orange "fire by night" and the black "smoke by day."

History
The insignia was approved on 31 Aug 66.

Source: The US Army Institute of Heraldry