... hotsale item Private mould Fashion shape Real factory Portable Mini USB2.0 PC Speaker System/mini stereo/laptop , subwoofer speaker , ... Laptop, PC, MP4, MP3, PDA, Home Theater, Portable Audio Player, Mobile Phone.Description:The portable laptop USB mini speakers ... PC, MP4, MP3, PDA, Home Theater, subwoofer speaker ,Portable Audio Player, Mobile PhoneSNR: 65db, Isolated rate: 40dB, Frequency: 180HZ- ...