Overview: Mini & slim, gives you mobile life. Trust surround 7.1 DSP processor Powered directly by USB (Universal Serial Bus) 2.0 data interface, no other power source required. Features 3.5mm stereo earphone & microphone jacks Driver-free installation when used with modern Operating Systems Specification: Weight Approx:0.0327kg Size Approx:30.6 2.4 1.9cm Cable Length Approx: 31cm Compatible system: Windows 98/98E/ME/2000/XP MAC OS 9.0/10.1 Package Contents:1 x USB2.0 to 2 lines sound card 1 x CD1 x Original Retail Blister