Smart-Trek Deluxe Stereo Headset with Volume Control and 3. 5mm TRRS PlugThe durable and sleek Smart-Trek deluxe headsets are versatile and compatible with a wide variety of technologies. Designed to stand up to the K-12 environment, Smart-Trek headsets are built to last. Smart-Trek feature a rugged and comfortable design, so teachers can have headsets that will function for years, and students can wear the headsets for an extended period of time. Its adjustable headband snaps easily into place to fit students of all ages. The ear cups are made with high-quality leatherette ear cushions that are easy to clean, durable, and provide excellent noise-isolation. Smart-Trek headsets feature a durable, flexible, steel-reinforced gooseneck microphone and trusted Dura-Cord - the chew, kink and knot-resistant, PVC-jacketed, braided nylon cord.