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Chuck holds the RX 77 he discovered concealed in Ilsa's necklace

The RX 77 Long Range Audio Transmitter is a Russian made electronic bug, which can transmit audio across long distances.

This model is featured in Chuck Versus the Undercover Lover, it was discovered as having been planted by Victor Federov in the locket owned by Ilsa Trinchina. It was through this bug that Federov overheard Chuck and Casey's conversation which blew her cover, and revealed her as a French Intelligence agent.


  • RX-77 may be a reference to Mobile Suit Gundam, an anime series with similar military designations for the titular Mobile Suits.
  • There is no letter X in the Cyrillic alphabet used by Russians - there is another Х, which reads as "Kh". The closest transliteration reads "Икс". Thus, a Russian device can't be named RX-77.
  • The Russians (Soviets) were also known to design a "bug" consisting of a single piece of metal - without power sources or moving parts. All it needed is a large metal object to serve as an antennae. Then they planted 36 of them in the American embassy in Moscow, including one right in the vent grill of the encryption room.