Double-Muff Intercom Headset

<Ear Coupling>Around-the-ear (Circumaural)</Ear Coupling> <Hardware>Stainless steel</Hardware> <Dome Type>Heavy duty headset, ABS Composite</Dome Type> <Contact Pressure>~ 2.69 lbs. (12 N)</Contact Pressure> <Connection Cable>5ft (1524 mm)</Connection Cable> <Earphone Type>Dynamic</Earphone Type> <Earphone Impedance>300Ω ± 15%</Earphone Impedance> <Earphone Frequency Response>20-20K Hz</Earphone Frequency Response> <Earphone Sensitivity>119±3db</Earphone Sensitivity> <Total Harmonic Distortion (THD)>Less than 5%@ 1000Hz</Total Harmonic Distortion (THD)> <Microphone Principle>Dynamic</Microphone Principle> <Microphone Impedance>150Ω±30%</Microphone Impedance> <Microphone Sensitivity>-69±3db</Microphone Sensitivity> <Microphone Frequency Response>200Hz~8KHz</Microphone Frequency Response>