Technical Details Specifications of Headphones Driver: Neodymium magnets, 40mm, custom dynamic Form Factor: closed back, circumaural (over the ear) Response to Frequency: 10 Hz to 40,000 Hz Sensitivity at 1kHz: 100dBSPL/mW T.H.D: < 2% Type of Frame: Aluminum Ear cushions: high-quality leatherette and memory foam A microphone The electronic condenser microphone is a specification element. Response to Frequency: 50 Hz–18 kHz -42dBV is the sensitivity (0dB=1V/Pa,1kHz). Electric condenser microphone as a boom mic element Boom Mic Polar Pattern: Noise-canceling, bidirectional Boom Mic Response to Frequency: 50 Hz–18 kHz Sensitivity of Boom Mic: -42dBV (0dB=1V/Pa,1kHz) Integrated Mic The electronic condenser microphone is the element. Integrated Mic Pattern of Polarity: Omnidirectional Integrated Mic Response to Frequency: 50 Hz–8 kHz Integrated Mic -33dBV is the sensitivity (0dB=1V/Pa,1kHz). Links and Characteristics Boom Mic Polar Pattern: Noise-canceling, bidirectional Audio controls include multifunction buttons, Bluetooth® volume, in-line volume, and microphone mute. Specifications of Batteries Battery Life: Up to twenty hours of operation Time Spent Charging: