NGS MSX6Pro. Device connectivity: Wired, Device interface: 2x 3.5 mm, Cable length: 2 m. Ear coupling: supraaural, Acoustic system: open, Headphone frequency: 20 - 25000 Hz. Microphone sensitivity: -62 dB. Package dimensions (WxDxH): 150 x 100 x 215 mm, Package weight: 270 g