... to use and install Car MP3 M.costa Digital CD changer M.costa Digital CD changer delivres CD-quality sound directly ... a SD card or USD disk,then you enjoy the digital music(MP3/WMA) in your car,Aux input for ... of sound quality that occurs with FM transmitter solutions.Control Digital Music changer from your car redio buttons.Works also ... Panasonic, Sony, Alpine,M-bus, Clarion,Ce-net, Pioneer, and Sanyo.