portable mobile phones subwoofer USB mini speaker system 2.USB/TF CARD SPEAKER 3.CE,ROHS FCC ... use at the office, homeeasy to carry - Powered by USB, 5.5V/1000mA, AC Power adapter - With FM ... function, Micro SD slot, USB slot - With Rechargable battery, have indicating light to show ... design. ¹²³ROHSCEFCC audio computer portable mobile phones subwoofer USB mini speaker system