Soyntec Netsound 550. Interface type: 3.5 mm, Cable length: 1.9 m. Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 116 dB, Impedance: 32 Ом. Microphone frequency: 30 - 16000 Hz, Microphone sensitivity: 58 dB. Weight: 63.6 g. Package dimensions (WxDxH): 210 x 80 x 250 mm, Package weight: 256 g