NGS Amphora Cipher. Device connectivity: Wired, Device interface: 3.5 mm. Ear coupling: supraaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 20 - 16000 Hz, Microphone sensitivity: -58 dB, Microphone input impedance: 2200 Ом. Package dimensions (WxDxH): 194 x 65 x 244 mm, Package weight: 215 g