Manhattan 175524. Device connectivity: Wired, Cable length: 2.2 m. Ear coupling: supraaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 30 - 16000 Hz, Microphone sensitivity: -58 dB, Microphone input impedance: 2200 Ом. Weight: 93.5 g. Volume control: Rotary