Thomson HED35ANC Outdoor noise cancelling headphone. Ear coupling: supraaural, Headphone sensitivity: 116 dB, Impedance: 32 Ом. Connectivity technology: Wired, Connector(s): 3.5mm, Cable length: 1.5 m. Dimensions (WxDxH): 160 x 68 x 180 mm, Weight: 435 g. Battery type: AAA