Sennheiser PC 2 CHAT Headset Mono Mini phone 3.5mm Wired 32 Ohm 42 Hz 17 kHz Over the head Monaural Supra aural 6.56 ft Cable Noise Cancelling Microphone Black - Office Depot
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Amazon.com: Sennheiser SC 135 USB (508316) - Single-Sided (Monaural) Headset for Business Professionals | with HD Stereo Sound, Noise-Canceling Microphone, & USB Connector (Black) : Electronics
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