This business line headset with noise reduction has a flat black H style quick disconnect connector which has 4 flat copper connectors within. An adaptor is required to convert this plug to an RJ22 coiled corded phone handset jack or an adapter for connecting to a 3.5 cordless telephone jack.
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WARNING: There are products on this website which can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to 