... party dj black speaker with ball led usb/sd/fm with USB/SD/FMwith karaoke function/two wireless microphonewith ... usb speaker,PA speaker, portable speaker,Speaker System, Active Speaker,Professional Speaker,bluetooth speaker,wireless speaker,,ipod speaker, iphone speaker,speaker ... stage party dj black speaker with ball led usb/sd/fm TROUBLE SHOOTING: FailurePossible causeNO POWERThe power line is cut ...