Description Model H-PC Over the Head Style (OTH) 3.5mm Plugs Newest Undercut, Comfort Gel Ear Seals Super-Soft, Double-Foam Headpad Dual volume controls This is a stereo headset 15' Extended Coil Cord Terminated with Dual 3.5mm Plugs (for Earphones and Microphone) Dynamic Earphone Elements with a Range of 20-20,000 Hz M-55 Noise-Canceling Microphone, Mounted on Universal Flex Boom SPDT Microphone On-Off Switch Weight (without Cord) - 16 oz. Made in the USA Noise Attenuation Data NRR23 dB Frequency (Hz) 125 250 500 1000 2000 3000 4000 6000 8000 Attenuation (dB) 16.6 20.7 27.4 33.0 30.5 36.2 38.1 36.6 36.6 Standard Deviation 2.6 2.5 2.5 2.6 3.1 3.5 3.7 3.7 3.6
