Sennheiser SC 660 ANC USB (508311) - Double-Sided (Binaural) Business Headset | for Skype for Business | with HD Sound, Active Noise Cancellation Microphone, USB Connector (Black) - Walmart.com
EPOS / Sennheiser IMPACT SC 668 1000581
Buy EPOS IMPACT SC 668. Premium, wired, double-sided headset optimized for use with high impedance/narrowband desk phones - MYITHUB