David Clark® H10-66N Headset, 27 dB, 100 to 5500 Hz (Earphone), 300 to 3000 Hz (Mic), 5 ft L

FEATURES
• High/low impedance select switch on dome matches headset to system impedance (military/civilian)
• Hinged wire boom with M-101 dynamic microphone
• Soft foam filled head pad
• Larger, yet lighter, undercut Comfort-Gel ear seals for maximum comfort
• Certified noise reduction rating - 27 dB

SPECIFICATIONS
• Sensitivity: 90 dB SPL on Flat Plate Coupler, 1 mW Input at 1 kHz (Earphone), Non-Amplified 0.07 to 14 mV at 1 kHz for 103 dB SPL Input or Amplified 400 mV +/-6 dB into 150 Ohm Load at 1 kHz for 114 dB SPL Input (Mic)
• Frequency Rating: 100 to 5500 Hz (Earphone), 300 to 3000 Hz (Mic)
• Impedance: 150 Ohm (300 Ohm Each, Wired in Parallel) (Earphone), 5 Ohm (Mic)
• Plug Type: U-174/U
• Cord Length: 5 ft
• Noise Reduction Rating: 27 dB
• Domestic/Import: Domestic