Except RGB and CVBS output, now we got an option: "USB plug-in navigation." Through original USB adapter, we can easily plug in Wonde Proud navigation box directly from its USB port. Models with USB navigation like SONY XAV-601BT and XAV-701BT , are now available for external GPS/Glonass navigation, 3G and wifi netowrk, TMC receiver, and bluetooth system.