The David Clark H3310 Ground Support Headset is a rugged, over-the-head communication system engineered specifically for high-noise tarmac operations and aircraft pushbacks. It provides certified hearing protection with a 26 dB Noise Reduction Rating (NRR) through high-attenuation ear cups, ensuring operator safety around active jet engines. For clear transmissions, it features a DC-1A noise-canceling dynamic microphone encased in a protective shield with an integrated momentary Push-to-Talk (PTT) switch to prevent ambient ramp noise from bleeding into the intercom line. Designed for maximum durability and long-shift comfort, the headset is constructed with a chrome-plated steel headband, fluid-filled cushions, and a 30-inch straight cord built to interface seamlessly with standard aircraft interphone jacks and extension cables.