inputs.text: used iphone 4 - combined [ [ asinb0042b9u8q griffin powerjolt dual universal usb micro ] ] connector vehicle iphone 4 not tested 4s accepted cable without problehems allowing charge listen music time use manufacturer carrier charger combined headphone jack connect car stereo used get nasty highpitched whine stereo charging cable pulls lineout audio channels nasty whine gone get charge time great car trips aware equalizer volume knobs no longer affect sound quality level car stereo device manage aspects