Creative Labs HS-620. Device connectivity: Wired, Device interface: 3.5 mm, Cable length: 2.5 m. Ear coupling: supraaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 80 - 18000 Hz, Microphone sensitivity: -41 dB, Microphone connectivity: 3.5 mm. Weight: 180 g