Wanted this to connect my phone to the 'AV in' sockets found on many TVs, so I could play the mp3s, in the music player incorporated in the phone, through the speakers in the TVs, in the rooms I was staying in, while backpacking in Thailand.
I can confirm this works on most TVs; just connect either the red or white plug on the cable to the 'audio in' socket on the TV, which may be coloured red or white, (or the TV may have both a red & a white audio socket, if it's a modern stereo TV, in which case connect both red & white plugs).
All TVs also have a socket marked 'video in' which might be yellow in colour. On some brands of TV, this needs a signal on it, before the audio inputs will work. If this is the case, you can sometimes fool the video input into thinking it's getting a signal (thus forcing the audio inputs to work), by plugging the other red or white audio plug on the lead, into this video socket.
You will have to select 'AV' on the remote control for the TV.
The sound quality is usually quite good, & indeed some TVs even have tone controls, so you can adjust the sound quality to your own taste.
You do this at your own risk & I take no responsibility for any damage caused, but I can say it works on lots of TVs & I have yet to blow up my phone, any tellys or myself!!!!