... Real factory Portable Mini USB2.0 PC Speaker System/mini stereo/laptop , subwoofer speaker ,vibration speakers systemSpecificationsIt is well suitable for ... clear sound. Overall, the USB laptop speakers provide great stereo sound, look great (with the elegant design) and ... for Laptop, PC, MP4, MP3, PDA, Home Theater, subwoofer speaker ,Portable Audio Player, Mobile PhoneSNR: 65db, Isolated rate: 40dB ...