“Is the headset plug in 2.5mm? If not, what is the size? Is the headset plug in 2.5mm? If not, what is the size?”

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• No. It connects using desk telephone style "registered jack" plugs, the 4P4C plug shown in this Wikipedia article: https://en.wikipedia.org/wiki/Registered_jack It is not for use with PCs, laptops, mobiles, or cell phones.

  Answered by ArtWholeflaffer 9 years ago

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• Yes, the headset plug is 2.5MM.

  Answered by CommunityAnswer 11 years ago

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