Dark Switch

Dark Switches were a previously-unknown control function found in Mass relays throughout the Galaxy. They allowed scientists from the Systems Alliance to perform their study of a neutron star on the other side of the Kappa Iota Relay, an area not suitable for Human life due to lethal radiation in the vicinity of the relay. The Dark Switches allowed the scientists to control radiation emissions and receive telemetry from their TR-15 Letus probe, which was able to scan the neutron star at a previously-unmatched proximity.