Seismic Disturbance Amplifier

Seismic Disturbance Amplifiers (or SDA Implants) are devices that are surgically integrated into the tracheas of all NERI Vanquisher units. They transmit sonic frequencies to the Vanquisher's brain whenever the devices detect logarithmic surface vibrations (usually from footsteps or items being dropped,) and use these signals to direct the Vanquisher to the origin of the vibration in order to eliminate their prey.