Thomson HED241 Outdoor Stereo neckband headphone. Ear coupling: supraaural, Headphone sensitivity: 98 dB, Impedance: 22 Ом. Connectivity technology: Wired, Connector(s): 3.5mm, Cable length: 1.2 m. Dimensions (WxDxH): 150 x 108 x 60 mm, Weight: 44.61 g