Stereo - Black - USB type A - wired - 20 Hz - 20 khz - over-the-head - binaural - supra-aural - noise Cancelling microphone Available in monaural (C3210/C3215) or Hi-Fi stereo with passive noise reduction (C3220/C3225) Variants include universal USB or usb-c Connectivity technology: wired Minimum frequency response: 20 Hz Maximum frequency response: 20 khz Earpiece type: binaural Weight (approximate): 4.16 oz