The INVICTUS line of push-to-talks was developed in 2018 as an updated replacement for traditional style Nexus U-94 PTTs that had been antiquated in design and function and were only available in single comm models. The initial INVICTUS line from Atlantic Signal featured single and dual comm models built for specific military or law enforcement radio models - meaning hard-wired cabled connector assemblies that could not be changed out. The INVICTUS SS is part of the US Marine CORPS HED (Hearing Enhancement Devices) Program.