100% brand new and high quality. USB sound is an USB audio controller. Supports AES/EBU, IEC60958, S/PDIF consumer formats for stereo PCM audio. Fixed 48 KHz sampling rate for 5.1 channel playback. Supports digital recording function with 32 KHz, 44 KHz and 48 KHz sampling rates. Supports recording function. Support SCMS protection. Compatible with Win98SE, ME, 2000, XP, Mac OS 9.1 (Mac version has 2 channel playback only). Fully duplex playback/recording audio stream without sound card in PC. Compatible with USB section v1.1. Compatible with USC audio device class v1.0. Supports USB full speed 12Mbit serial data transmission. 3 input terminals and 3 output terminals. Supports multi channels audio code interface for 5.1 channel playback. Supports conventional audio 2 channels source playback(only L.R. channel active) Plug and Play under windows without external memory.