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Logitech Wireless Headset Mono H820e - Mono - Wireless - DECT - 328.1 ft - 150 Hz - 7 kHz - Over-the-head - Monaural - Supra-aural - Electret Microphone - Yes 981-000511 012300472098
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Amazon.com: Logitech H570e Wired Headset, Mono Headphones with Noise-Cancelling Microphone, USB, In-Line Controls with Mute Button, Indicator LED, PC/Mac/Laptop - Black : Electronics
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