A device that Travis hid somewhere in the west of an undisclosed location, which is what SYSTEM needed in order to prevent the 7/10 Tone channel (and itself) from being shut down completely.
In SERVER 01, The Sleuths helped SYSTEM unlock access to the transmitter by generating random keys with APP TRUSTED 02, which they were successful in the end and SYSTEM found all 10 keys to gain access just in time before 10 August 2025.
It is likely that this device is important for operation of the 7/10 Tone channel in some way.
What the transmitter sounds like, according to SYSTEM.