Amazon.com: Sennheiser SC 160 USB (508315) - Double-Sided (Binaural) Headset for Business Professionals | with HD Stereo Sound, Noise Canceling Microphone, & USB Connector (Black), Black : Electronics
EPOS | Sennheiser SC 160 - Overview and Mic Test - YouTube
Sennheiser RS 160 Digital Wireless Headphones with 60 Foot Range Portable Transmitter - B-Stock | Reverb