Sony's RK-G138 Audio Connecting Cord features a headphone extension cord to allow listening at a greater distance as well as conversion between the stereo mini plug and the stereo phone plug. The RK-G138 also connects the Stereo UniMatch plug to Stereo mini jack (9ft 10in / 3m).
Amazon.com Product Description
The RK-G138 connecting cable will allow for a few significant connections. First, you can use the cable to extend your headphone cord, allowing you to be further away from the sound source. You can also use the RK-G138 as a conversion between a stereo mini-plug and a stereo phone plug. Finally, you can connect a stereo UniMatch plug to a stereo mini-jack. However you choose to use this connecting cable, you will three meters (9.8 feet) to do so with. This long extension will greatly increase your ease of movement and provide more mobile listening pleasure.
