Sold as 1 Each. Durable and sleek computer headset with volume co,so teachers can have a headset that will function for years,and students can wear the headset for an extended period of time.,braided nylon cord that is chew-,kink- and knot-resistant. Frequency response: 50Hz - 16kHz. Adjus,durable,and provide excellent noise isolation. Made of plastic with high-,Macs,and most gaming systems.