What are 35mm jack cables used for?This 35mm Jack cable carries Stereo sound across a variety of audio devices It is a highly versatile cable and commonly used when connecting audio equipment to smartphones and MP3 players tablets computers TVs and gaming consoles It is also used in many in-car audio and DJ audio systemsWhat is twin phono used for?Twin Phono is also known as an RCA connection and carries two mono signals across each Phono connector which are combined in audio equipment for stereo sound