Amazon.com: Sennheiser SC 165 USB (508317) - Double-Sided (Binaural) Headset for Business Professionals | with HD Stereo Sound, Noise-Cancelling Microphone, & USB Connector (Black) : Everything Else
EPOS Sennheiser SC 165 USB headset with 3.5 mm jack and detachable USB cable with in-line call control – Prisa Enterprises
Amazon.com: Sennheiser SC 165 USB (508317) - Double-Sided (Binaural) Headset for Business Professionals | with HD Stereo Sound, Noise-Cancelling Microphone, & USB Connector (Black) : Everything Else