Altec Lansing’s AHS602i features SRS 3-D Audio technology, an audio enhancement technology that provides a realistic and spacious listening experience through headphones. This award-winning technology retrieves the spatial information from surround recordings and restores the original three dimensional sound field. High Performance 40mm neodymium drivers deliver a wide frequency response and bass you can feel. Closed ear-cup headphone design improves clarity and minimizes ambient sounds. Noise-rejecting microphone helps minimize background noise. Handy in-line volume control regulates audio level. Microphone volume controller (High- Low-Mute) maximizes communication control. Best of all, they’re comfortable and lightweight enough to wear every day.