The Koss Race Tracker stereophone is an extra-durable stereophone that delivers amazing passive noise reduction. Like the QZ99, the Race Tracker was initially designed for use with racing radio scanners and metal detectors users, and provided a behind-the-head headband design. Since then, the Race Tracker has become a favorite for a wide range of listeners who need to cut high levels of ambient noise and do not want the constraints of a conventional headband.