["brand new and high quality\r\n The USB Virtual 7.1 Channel Sound Adapter is a portable sound controller that can add 3D sound to any PC equipped with a USB port. The device is small enough to fit comfortably in the for palm of the hand and light for easy transportation. It is also easy to use - simply plug the device into a spare USB port and it provides instant, high-quality audio via speakers or headphones. It produces a superior sound to its 5.1 predecessor.\r\nfor USB 2.0 full-Speed Specification\r\n for USB Audio Device Class Specification 1.0\r\nfor USB for HID Class specification1.1\r\nInclude Xear 3D,the virtual 7.1 channel sound simulation software for Windows XP/Vista 98se/ME/XP/2000/2003/Linux, for Mac OS\r\nUSB2.0 Full-Speed (12Mbps) Specification\r\nConnectors: USB Type A, Stereo output jack, mono microphone input jack\r\nUSB bus-powered, no external power required\r\nLED indicators: Microphone-Mute Status, Activity\r\nSize:5.70*2.50*1.40cm/2.24\"*0.98\"*0.55\"\r\nQuantity:1Pc"]