1.mini mp3 speaker system 2.High quality. 3.Aluminium shell 4.Support U disk+micro SD+earphone hole. 5.hifi- ... design makes tone performance perfect.4) Metallic, shell shows noble and fashionable, out of ordinary, with many colors, several solution, for your ... connect line (can choose), Built in Rechargeable Li-ion Battery with charging indicating led.6) 3.5mm Earphone slot7) Dimension: 50x50x50mm8 ...