Soyntec Netsound 450. Interface type: 3.5 mm, Cable length: 1.89 m. Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 110 dB, Impedance: 32 Ом. Microphone frequency: 30 - 16000 Hz, Microphone sensitivity: 58 dB. Package dimensions (WxDxH): 175 x 60 x 245 mm, Package weight: 0.158 kg. Operating voltage: 3 V