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I'd have to confirm in the manual, but the headset jack looks like it's 2.5mm. If so, then any 2.5mm headset would work.
Sorry, there was a problem. Please try again later.Hello! In order for the headsets to work with the phone system, they need to support the HeadSet Profile specification (HSP). We encourage you to check our Panasonic Telephone Bluetooth Headset Compatibility FAQ, to review the tested headsets for KX-TGF975S. If your product is not listed, it was not evaluated and we advise you to confirm with the product's manufacturer if it supports HSP (Headset profile). -C
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