The Techlink wires 2RCA plugs to 2RCA sockets is a universal lead which is used for joining the stereo RCA/ Phono input/output of audio sources together all at the same time. It is used for joining the audio output device simply into an amplifier The connecters are nickel plated stainless steel with an aluminium foil shielding & a polyethylene dielectric insulator. This particular product won best cable brand of the year in 2007.