Behringer HPM1100 - closed headphones with microphone and USB connection

Headphone sensitivity: 96 dB | Headphone frequency: 20 - 20000 Hz | Package contents: Ear cushions | Recommended usage: Universal | Driver unit: 4 cm | Microphone type: Built-in | Product type: Headphones | Wearing style: Head-band | Connectivity technology: Wired | Package contents: Foam Windscreen x 1 | Cable colour: Black | Product colour: Black | Ear coupling: Circumaural | Cable length: 2 m | Headset type: Binaural | Impedance: 32 Ω