Couple of options. For $50 or less, you can put in a custom AUX port into the factory deck. Tends to have bad quality. For $50 or more, you can put a dock in your accord, and have a much higher quality audio experience, as you will be able to control more audio variables. The previous owner of my car went the cheap way, and it sucked. I changed to upgrading the whole deck, and my music is great. It helps that I put in a sub and polypropylene speakers as well.