B-50Q headset is used in applications from auto racing to industrial, Ideal for airport tarmacs, fans at car races, construction sites and other intense noise environment. and heavy equipment operation, providing tough reliable 2-way communication.Features DNC microphone for clear transmissions and Clear Hear speakers for unsurpassed audio performance. Rugged headsets are built to perform in extreme noise environments -combining the latest technology and firm, yet comfortable fit for optimum communication.