Metal 6.35mm (1/4 Inch) Mono Plug to RCA Jack Adapter 5pcs 6.35mm 1/4" Male Mono Plug To RCA Female Jack Audio Adapter Connector Great for speaker use for mono channel microphone connecting. Widely used in home, KTV, or other places where use the audio devices. You can create a RCA socket by insert the 6.35mm mono plug to a 6.35 socket easily.