Esperanza operates the castanet telegraph while dancing at the Mira Loma cantina.
Communication apparatus disguised as a pair of castanets.
The castanets are clicked in Morse Code and the signal received by a similar device at CONTROL Headquarters.
The castanet receiving device at CONTROL Headquarters.
Used by CONTROL agent Esperanza while undercover as a dancer at the cantina in Mira Loma, Mexico.
[Episode #103: "Tequila Mockingbird".]