Features: Small volume, easy to carry Stereo double channel output Dual channel technology, implementation of 5.1/7.1 channel dynamic sound Real time entertainment center The product CD driver, USB plug and play, no need to install any program, not only the personal computer, notebook computer can be used With stepless large metal knob and special switch, the use of more convenient Different headphones experience In the use of MY MUSIC headphones, the Sound Blaster card technology lets you music is no longer confined to the headphone earmuffs, it really will sound in your environment. Through CMSS-7D technology, you will be able to feel the environment seems to have multiple virtual box placed on all around, so real, like I was in love the band center even listening position is the best. Specifications: Power supply: USB 5V Product use: desktop / laptop /USB interface System requirements: Applicable to WINDOWS 98/SE/ME/2000/XP/Server 2003/7, USB external independent digital 7.1 sound field Product line: 110cm Product dimensions: 5.4*5.2*2.8cm(L*W*H) Package includes: 1 * A889 Digital Sound Blaster Card 1 * CD