Ultron UHS-850 Booster Multimedia VOIP. Ear coupling: supraaural, Headphone frequency: 30 - 16000 Hz. Connectivity technology: Wired, Cable length: 2.4 m. Dimensions (WxDxH): 180 x 80 x 180 mm, Weight: 210 g. Package dimensions (WxDxH): 230 x 155 x 280 mm, Package weight: 360 g. Maximum input power: 0.15 W