Features: USB2.0, universal bus single interface, no external power supply, plug and use, easy operation. Support WAV/MP3/WMA/MPEG1 (VCD)/MPEG2 SVCD)/AVI/DVD_ Audio/DVD_ AC3/DVD_ DTS/DiVX format file. It adopts advanced Xear 3D technology, supports MS DirectX, EAX1.0/2.0, HRTF 3DX functions, and support for Windows2000/XP. Multi-channel technology, strong virtual 5.1 channel dynamic sound effect, microphone input signal is directly converted into digital signal, improving voice quality, especially suitable for voice input and identification! Compatible USB1.1/2.0 high-speed transmission, digital key-design, convenient for volume control. Specifications: Material: ABS Color: Black, Blue(optional) Size: Approx. 5.1x2.3cm/2.0x0.9inch Package Includes: 1x USB2.0 5.1-channel Sound Card note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow for slight color differences due to different monitor resolutions.