The SD-X-series battle droid represented a sophisticated form of droid technology, designed for both engagement in armed conflict and providing security details.
In terms of size, the SD-X exhibited a slightly more compact form factor when compared to the YVH model, and crucially, it lacked any physical traits associated with the Yuuzhan Vong. Furthermore, it was not equipped with the specialized array of sensors specifically engineered to identify Yuuzhan Vong infiltrators.
Its exterior was coated with a unique, black, non-reflective, sensor-baffling stealth material, giving it the ability to avoid detection. While capable in combat scenarios, its primary role was more frequently centered around protective assignments.
Known for its unwavering resolve and intense concentration, the SD-X displayed a remarkable ability to pursue assassins and criminals, even continuing its pursuit for weeks following an assault on the individual it was tasked to safeguard.