The Hamilton Buhl LCB/10/HA5USBSM is a 10-pack of high-quality HA-5M stereo headsets, ideal for use in schools and other institutions. The headsets feature fully adjustable headbands and washable, replaceable leatherette ear cushions for comfort. The headsets feature built-in gooseneck microphones for clear computer-based communication. You can connect to Macs or PCs using the USB 2.0 connector. Large cobalt drivers provide a wide frequency response, while virtual Dolby 5.1 effects create a wide, realistic soundstage. The single-sided cable helps to minimize messy tangles and features an in-line unit for volume control and muting. A sturdy laminated cardboard case is included for storage.