Dell Pro WH5024 Wired ANC Headset (520-BBGQ) - Speaker Size: 40mm, Frequency Response: 20Hz - 20kHz, Noise cancellation (microphone): AI Up-Link Noise Cancellation, Microphone Type: 2 Uni-Directional, AI Beam Forming, Form Factor: On-Ear, Connection to PC: USB-C, Button Controls: Mute/unmute mic on controller (Mutes when in discreet mode), Volume +/-, Answer / End Call