Jabra Evolve 20 MS Duo USB-C. Product type Headset. Wearing style Head-band. Recommended usage Office/Call center. Connectivity technology Wired. USB connector USB Type-C. Ear coupling Supraaural. Headphone frequency 150 - 7000 Hz. Impedance 32 ?. Microphone type Boom. Microphone frequency 100 - 10000 Hz. Microphone sensitivity -44 dB. Width 180 mm. Depth 230 mm. Height 35 mm