Sennheiser HD 435. Ear coupling: supraaural, Headphone frequency: 18 - 19500 Hz, Headphone sensitivity: 110 dB. Connectivity technology: Wired, Connector(s): 3.5/6.35 mm, Cable length: 3 m. Weight: 160 g. Package dimensions (WxDxH): 210 x 111 x 270 mm