Super Soft, Double Foam Head Pad New Comfort gel, undercut ear seals Certified Noise Reduction Rating - 23 dB Reduced headband force Universal Flex Boom for perfect microphone placement Exclusive M-7A, the most advanced noise-cancelling microphone available Low-profile volume control knob with detent settings Molded cord assembly made to exceptional pull and flex standards 5-year Guarantee FAA TSO Approved C57 Cat. B and C58a Exceeds RTCA/DO-214 Standards Weight (without cord assembly): 16.5 oz. Special Features: Passive, robust General Aviation FAA TSO Approved C57 Cat. B and C58a Technical Specifications Earphone Type: Dynamic Earphone Impedance: 150 ohms(300 each; wired in parallel) Earphone Sensitivity: 90 dB SPL on flat plate coupler, re 1mW input @ 1KHz Earphone Frequency Response: 200-5,500 Hz Earphone Plug: PJ-055 (.25" phone plug) Boom Type: Universal Flex Headpad/Hardware: Super-Soft, Double-Foam Headpad,Lightweight Hardware Noise-Canceling Mic: M-7A Amplified Electret Mic Impedance: 50 ohms +/- 20% Mic Sensitivity: 400mV RMS ±6dB into 150 ohm load @ 1kHz for 114dB SPL input Mic Freq Response: 300Hz--3.5KHz per RTCA DO 214 Mic Plug: PJ-068 (.206" phone plug) Cord: 5 ft.Straight Weight/Headset Only: 16.5 oz.