Bandridge BHS210. Device connectivity: Wired, Device interface: 3.5 mm, Cable length: 1.8 m. Ear coupling: circumaural, Headphone frequency: 20 - 16000 Hz, Impedance: 32 Ом. Microphone frequency: 100 - 10000 Hz, Microphone sensitivity: -54 dB, Microphone input impedance: 2200 Ом. Connector(s): 2x 3.5mm M