Sennheiser MX 90 VC. Ear coupling: intraaural, Headphone frequency: 18 - 22000 Hz, Headphone sensitivity: 117 dB. Connectivity technology: Wired, Connector(s): 3.5 mm, Cable length: 1.2 m. Weight: 12 g. Package dimensions (WxDxH): 97 x 58 x 203 mm, Package weight: 207 g