The RX-series bell droid was a line of RX-Series pilot droid that worked for Star Liner Travel during the New Republic Era. They were often used on commercial flights to carry luggage to the starliners and scan people to see if they were carrying weapons, since no weapons were permitted aboard a flight.
The RX-series bell droid originally appeared in "Chapter 5: Return of the Mandalorian," the fifth episode of the live-action Disney+ television series The Book of Boba Fett, which was directed by Bryce Dallas Howard and aired on January 26, 2022.