Specifications: Frequency Response: 100 Hz –8 kHz Input Impedance: 200 ohms Sensitivity: 118 dB SPL Ear Coupling: Circumaural Microphone Impedance: 100 Hz –10 kHz Microphone Sensitivity: -34 dBV/Pa ± 3 dB Features: True wideband sound that meets VoIP standards Two boom/microphone styles Extra-thick, pivoting ear cushions PeakStop technology protects against sudden loud sound spikes