The AC-4000 is a stereo headset built from the ground up for today's most demanding classrooms. With a clever channel design, the headband and ear cups serve as a cable management system for convenient storage of headsets when not in use. It utilizes a single 3.5mm (CTIA compatible) combo plug, compatible with Macs, Chromebooks, most newer PCs, tablets, and more. FEATURES Unidirectional noise-canceling microphone Leatherette ear pads Flexible mic boom Adjustable headband Classroom tested durable design Braided TuffCord