It has a similar function to the Scramblerperk in Call of Duty: Modern Warfare 2. It also has the function of disabling voice announcements to any enemy players within its proximity, and disabling any enemy equipment within its proximity. However, it must be placed at a certain location and will only affect players that are close to it. Becuase of the small radius and the loud noise it makes, it's a questionable choice of equipment to use, outside of getting challenges done. It's best discarded in favor of a different piece of equipment, mainly C4 or the Motion Sensor.