APPS2Car Honda Goldwing Gl1800 USB Sd Aux Mp3 Adapter Digital Cd Changer Control the music file from radio buttons, Track+/-/Disk/+/-/Rpt/Radom control are available Last position memory function ; CD sound quality,no FM noise Support USB Flash, SD Card and 3.5mm jack input. No signal interfere, No battery required. Direct Connection via CD changer Port with CD quality sound.