Altec Lansing MZX436. Ear coupling: intraaural, Headphone frequency: 20 - 20000 Hz, Headphone sensitivity: 107 dB. Connectivity technology: Wired, Headphone connectivity: 3.5 mm, Cable length: 1.2 m. Package dimensions (WxDxH): 211 x 211 x 249 mm, Package weight: 3620 g