... mould Fashion shape Real factory Portable Mini USB2.0 PC Speaker System/mini stereo/laptop , subwoofer speaker ,vibration speakers systemSpecificationsIt is ... the advanced technology with class-D digital power amplifier, able to perform high efficiency, low distortion- ... Laptop, PC, MP4, MP3, PDA, Home Theater, subwoofer speaker ,Portable Audio Player, Mobile PhoneSNR: 65db, Isolated rate: 40dB, ...