NGS Vox300dj Sharp. Device connectivity: Wired, Device interface: 3.5mm. Ear coupling: circumaural, Headphone frequency: 20 - 20000 Hz, Impedance: 32 Ом. Microphone frequency: 20 - 16000 Hz, Microphone sensitivity: 42 dB, Microphone input impedance: 2200 Ом. Package dimensions (WxDxH): 235 x 80 x 280 mm, Package weight: 0.325 kg