... Real factory Portable Mini USB2.0 PC Speaker System/mini stereo/laptop , subwoofer speaker ,vibration speakers systemSpecificationsIt is well suitable for ... , MP3/MP4 players through USB line and 3.5 inch audio cable. The speakers utilize the advanced technology with ... for Laptop, PC, MP4, MP3, PDA, Home Theater, subwoofer speaker ,Portable Audio Player, Mobile PhoneSNR: 65db, Isolated rate: 40dB, ...