PH-100H helicopter headset is Helicopter pilots Very fond of comfort features headset. Designed specifically for Helicopters it provides the comfort all rotary pilots require by coming,while providing a whopping 23db of hearing protection. Super-soft  double-foam head pad, half foam half gel-filled ear seals and reduced headband force combine to create one of the most comfortable headsets available. Include volume control knob and Adjustable Metal boom Arm, noise-cancelling amplified electret microphone. PH-100H helicopter headset comes standard with a coiled cord and U-174/u plug