Pro grade stereo headset/microphone, rotary volume control, durable adjustable headband with leatherette ear pads. Educational Series Stereo Headset and Boom MicThe AC-960 stereo headset is the perfect choice for any school. Equipped with large, 40mm drivers, the AC-960 delivers solid performance and a comfortable fit. Built with an extremely durable design, this headset will hold up in any classroom. The leatherette ear pads sit comfortably on the ears and are great for long usage.