... protable loudspeaker, which can take along anytime anywhere, especially, its with LED light Mini protable digital loudspeaker Main features1. Audio In/out ... SD reader card up to infinity -TF card slot4. with LED indication light -LED torch5. USB recharger -USB slot6. power supply -power ... insert TF card into digital loudspeaker4. If connect the speaker with PC by USB line, then can read, write, copy, ...