Features of the GCA-4GH helicopter headset include: 24dB NRR hearing protection, BNC clear-hear electret mic, full-flex boom, rugged Mil-Spec cabling, dual volume control, high fidelity headphone drivers,thumb nut headband adjusters, high-flex reliable wiring, gold-plated plug, rugged ABS ear cups, and chrome stainless steel headband. Included with headset: Wide comfort foam ear seals, cotton cloth ear covers, 5 year factory warranty