Product ReviewsT400 Headset headsets Headphone For Plantronics SP-04 SP-05 PLX400 PLX500

Not for standard landline phones.

It doesn't work with a landline telephone that isn't set up to manage its electronics. Other, competing products that have this issue actually say so in their text. This one does not.

Verified purchase:  Yes | Condition: new | Sold by: anter_made