Check the listing for details. Koss SB40 Computer Headset with Microphone, Black One Size. Color: black/gold, Condition: New. Listed at 42.78 USD. Koss SB40 Computer Headset with Microphone, Black ✓ Free 60 Day Returns ✓ Free Express Shipping Description: Frequency response: 20Hz-20kHzDynamic element for premium sound at all volume levels Full-range of sound excellent for gaming Soft large leatherette closed ear cups surround the ear for maximum isolation Microphone eliminates excessive background noise for a greater ease of use with PC voice applications Adjustable headband to fit most head sizes Built of durable plastic to stand up to the rigors of daily wear and tear Straight dual entry cord Enjoy quality sound and hands-free talking at your computer with the SB40 computer headset from Koss. The closed-ear headphone, or stereophone, as Koss calls it, blocks sounds from within the earcups and without, maximizing privacy and intelligibility. The boom microphone offers a pickup pattern that rejects off-axis sound, so the parties on the receiving end of your calls will hear your voice and little else from your mic. Smooth leatherette cushions and the headband's adjustable, cloth sling and provide comfort during extended use, while the headset's straight, 9-foot cord grants ease of movement at a good-sized radius from your work station.What's in the Box Headphones, data sheet. Features: Koss stereophone with dynamic microphone for hands-free communication from your personal computer20 to 20,000 Hz frequency response; closed-ear leatherette cushions offer maximum isolation of sounds within and withoutDynamic microphone for optimized pick up pattern (rejects off-axis sound)Adjustable, cloth sling and headband provide comfort during extended useStraight, dual-ear, 9-foot cord Product Details: Brand: KossModel Name: Language _ tagColor: BlackForm Factor: Closed-backConnectivity Technology: WiredProduct Dimensions: 3.94 x 7.01 x 9.06 inchesItem Weight: 0.023 ouncesItem model number: SB40National Stock Number: 5965-01-527-1220Is Discontinued By Manufacturer: NoDate First Available: August 16, 2001Manufacturer: KossLanguage: EnglishCountry of Origin: ChinaItem Weight: 0.66 GramsNumber Of Items: 1