The zm-rssc is a 5.1 Channel headphone sound card which can connect to any pc through a usb port. You can get front, rear, center and sub woofer sound through the sound card to your headphones making it great for just about any computer with usb. Features: small and compact. Easy-to-connect plug-n-play usb interface. Digital and analog output this product supports both optical and coaxial types of digital outputs along with analog 5.1 Channel outputs. 3 Volume controls 3 volume controls provide independent level adjustments for the front, rear, and center/subwoofer output channels. (For digital output, the volume can be controlled by a volume control on a speaker.) Amplifier included a built-in amplifier provides full sound and ease of use. Specifications: input: 1 usb connection port(usb 1.1/2.0 Compatible). Output: 3.5Mm stereo jack x3(front, rear, center/subwoofer). 0.6W per channel, 1 digital port (both optical and coaxial, capable of outputting 5.1 Channels) chipset sonix 5.1 Sound. Sampling rate: 24bit 96khz d/a and a/d converte. Size: 80 (w) x15 (h) x 108 (d) mm. Power consumption: minimum 3.3V, 150ma (standard 5v, 500ma).