Insignia Description
A silver color metal and enamel device 1 3/16 inches (3.02cm) in height overall consisting of five flashes converging at center on a silver disc with three concentric black circles all encircled by an orange scroll inscribed "PROFESSIONAL" at top and "COMMUNICATIONS" in base in silver letters.

Symbolism
Orange and white (silver) are the colors traditionally associated with the Signal Corps. The disc with black lines alludes to the globe, the flashes forming lines of longitude, and symbolizes the far reaching scope of the unit’s mission. They also resemble a target, indicating accuracy and efficiency. The five flashes refer to the unit’s numerical designation.

History
The insignia was authorized on 13 Apr 1983.

Source: The US Army Institute of Heraldry