T"nB ESCOMXGN. Ear coupling: intraaural, Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 95 dB. Connectivity technology: Wired, Headphone connectivity: 3.5 mm, Cable length: 1.2 m. Dimensions (WxDxH): 70 x 70 x 20 mm. Maximum input power: 0.01 W