The C-40 headset blocks out cabin noise & provides crisp, clear communications. It features a high-performance electret microphone for superior sensitivity. The padded head- band adjusts to fit all head sizes comfortably. 'No-Head- Squeeze ear seals are made of soft polyurethane to minimize pressure, reduce noise and provide a comfortable fit. The extremely efficient receivers are wired in parallel for greater reliability. The headset comes with PJ-068 and PJ-055B plugs and is furnished in handsome military gray color.