First make sure your car radio is compatible K7; indeed and this is also stated on the packaging: "You can not use the CPA-9C with some car audio-cassettes"
We must all, that your reader does not have an insert with the discovery with tape side to the bottom of housing
If your drive is compatible, so like mine, it has a cassette insertion on the side; then you long walks along with your favorite music
This adapter has changed my life because my old tapes were beginning to falter and I bought more for in time; I still poorly captais radio
The sound is perfect I hear no sizzle, no interference, just music; a very clear sound
Operation;
1 / Connect the tape on your mp3, instead of headphones via the 3.5mm jack
2 / Turn on your car radio (or start your car)
3 / Turn down the volume on the car radio
4 / Tune to normal position
5 / Turn your mp3 player and adjust the sound
6 / Here we go: your car sounds from your favorite music
Easy as pie, thank you Sony
