ENC Noise Cancelling Microphone HD Stereo Sound and Bass-enhanced HD loudspeakers USB-A / USB-C / QD Options/ 3.5 mm UC & Microsoft Teams Ready(420DM) Leather Cushions and dual headband with leather for superior comfort Built in with Ear Protection Feature Variants 420DM ENC Stereo USB Headset with MS Teams (420M Monaural Ver.) 420DP Binaural QD Headset (420P Monaural Ver.)