Feature - Supports AES/EBU, IEC 60958, and S/PDIF - Supports true 5.1 and 7.1 channel audio output; compatible with 5.1 speaker systems - Sampling rates up to 48 kHz (supports 32 kHz, 44.1 kHz, and 48 kHz digital recording) - Optical (TOSLINK) output supports 48 kHz only; DTS-CD at 44.1 kHz requires sample rate conversion for playback - Compatible with Windows 98/ME/2000/XP/Vista/7/8 and Mac OS 9.1 (stereo output only on Mac) - Enables full-duplex audio playback and recording without requiring an internal PC sound card - USB 2.0 interface, backward compatible with USB 1.1 - Compliant with USB Audio Device Class Specification v1.0 - Supports USB full-speed data transfer up to 12 Mbps - Includes three input ports (including one optical input) - Includes three analog output ports and one optical output port - Output configuration: 5.1-channel analog + optical - Designed for use with PC, external amplifier, and 5.1 speaker system - Ideal for home theater PCs (HTPC), movies, gaming, and voice communication; supports standard headphones for chat and online voice applications - Enables AC-3 or DTS surround sound playback in digital home theater setups or when connected directly to a 5.1 active speaker system - Package includes: 1 x Sound Card