Subcortical neural implant

Subcortical neutral implants are implanted devices given to Ærolith Dynamics employees as part of the hiring process. They are the primary means by which the company's various artificial intelligences communicate with employees, both on Earth and on Typhon.

Range
Residents must be in range of a Resonance spires for the implant to work. On Typhon, Argos Tower was originally not in range of these spires and mobile transmitters had to be brought in when a Typhon-wide announcement needed to be made for the first time. Prior to the installation of SAYER as Tower Overseer, new spires were built to resolve this problem.

The range is even more limited on Earth, given the vastness of space needed to be covered. Dr. Smith was able to leave the range of SPEAKER's spires during the episode "Welcome Back".

Issues
While it is technically against policy, it seems that someone began recycling decommissioned implants for use in new residents, likely as a Board-approved cost-cutting measure. This notably led to an issue where, despite that implants were updated to prevent those outside the development team from being contacted by it, some ordinary residents (including Sven Gorsen and Amanda Jones) were able to receive broadcasts from FUTURE. Medical staff are under orders to replace them if they are detected.

Transmission on some frequencies by residents' bloodborne nanites can cause unpleasant side effects like a crawling sensation under the skin. Additionally, while this frequency can be tuned remotely (in the case of radio wave interference or other issues), this tuning can cause vertigo and other side effects.