The present invention is equipped with a USB interface 7 for being connected to a portable music player that is an external device, a browser button 27, a rotary encoder button 26, a back button 28, CPU 31 for acquiring a content list CL from the portable music player, RAM 33 for storing the content...http://www.google.com.hk/patents/US8170232?utm_source=gb-gplus-share專利 US8170232 - Vehicle-mounted device
