portable mobile phones subwoofer USB mini speaker system 2.USB/TF CARD SPEAKER 3.CE,ROHS FCC certificate 4.Brand:MUSIC ANGEL ... 2 - Line in: configure 3.5 mm stereos plug - Loud speaker: 1.77inch (external diameter 40mm) magnetic resistant 4 Ohms - ... available: black, pink, blue, green, silver or customer design. ¹²³ROHSCEFCC audio computer portable mobile phones subwoofer USB mini speaker system