Car stereo additional functions ipod charger ipodusb connection usb player rds radio data system id3 tag bluetooth integrated features usb player radio audio formats mp3 receiver tuner amfm station memory 30 total output power 4 x 55 watt connections aux in subwoofer direct connect pre amp out subwoofer output usb display type lcd bluetooth profiles hfp a2dp opp spp avrcp pba pbap illuminated keypad blue red bluetooth features pairing speed d