An Ultra-frequency laserwave link was installed on the Millennium Falcon during the Mission to Monastery. This allowed C-3PO to connect himself to the device and communicate with R2-D2 on the planet below, as well as listen in on anything picked up by R2-D2's audio sensors.
- Star Wars 35: Dark Lord's Gambit (First appearance)
- Star Wars 36: Red Queen Rising
- Star Wars 37: In Mortal Combat