A masking transponder was a device manufactured by the Corellian Engineering Corporation that was used to replicate starship-identifying signals, thereby masking a starship's actual signal or acting as a diversion.
In 4 BBY, the smuggler Lando Calrissian owned numerous masking transponders which he kept at his farm on Lothal. Calrissian exchanged at least four transponders to the Spectres for three Imperial shield generators, which helped masked the rebels' escape from Lothal.
- Star Wars Rebels: The Siege of Lothal (First appearance)
(First identified as masking transponder)