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Plantronics EncorePro 300 Series Headset - Mono - Quick Disconnect - Wired - 32 Ohm - 50 Hz - 8 kHz - Over-the-head - Monaural - Supra-aural - Noise Cancelling, Uni-directional Microphone - Noise Canceling - myEliteProducts
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Amazon.com: Global Teck Bundle USB Headphones Plantronics EncorePro 320, USB-A, USB Headset with Microphone for Laptop, PC, MAC, Noise Cancelling, Volume and Mute Buttons
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