Plug in your favorite guitar and turn your PC or Mac computer into a guitar amp and recording system without the need for any other hardware. Stereo Headphone output lets you jam with your computer and can also be used for monitoring with active monitor speakers. Works directly with PC or Mac computer, Ultra-Low latency driver for PC included. High-quality components and exceptionally rugged construction. Variable-speed file playback function for MP3, WAV,AIFF audio files, perfect for easy learning and practicing. Easy Plug and Play Installation. USB bus powered--Requires no external power.