^^ What he said. My thread he linked has a list of most all of the inputs available for the Mz3. If you're looking for just a 3.5mm input then I'd recommend either the grom simple input, or the auxmod basic. The main difference between the two is that the AuxMod plugs into the TAPE/MD jack on the bottom of the HU while the grom plugs into the sirius/CD changer input on the back of the HU. Both will work fine and will do what you want them to.