An RCA coupler (female to female) is a small inline adapter used to join two RCA‑terminated cables, extending their length or linking components when a longer run is needed. With female jacks on both sides, it accepts the male RCA plugs commonly found on audio and video cables, making it useful in production environments for patching playback devices, projectors, switchers, or consumer‑level gear that still relies on RCA connections. Its simple barrel‑style design maintains the signal path while offering a quick, tool‑free way to bridge cables during setup or troubleshooting.