Hercules Pocket-Size 5.1 USB External Sound Card (4780580) Sound card is powered by your computer's USB port. Ultra-compact and lightweight, this is the ideal solution to enjoy 5.1 surround sound in DVD movies and games on your laptop or netbook. Handy software lets you control settings and effects. Ergonomic volume control by pressing two buttons (+ and -),with quick mute function. Output connectors at the back of the device for enhanced ergonomics: Front/Center/Rear, for 5.1 surround sound effect. Input connectors on the front of the device: line input for audio source (MP3 player, iPod), microphone input, amplified headphone output. Xear3D technology for 3D positional audio (compatible with Microsoft DirectSound, DirectMusic, EAX 1.0, EAX 2.0). Includes control software for settings and effects. Box Contents: Game surround Muse XL Pocket LT3 external audio module; Mono headset; Installation CD-ROM containing: Microsoft Windows XP SP2/Vista/Windows 7 drivers; and User Manual