No. They look alike but the Plantronics CS50 is wired just for that unit and the Plantronics CS55 is wired just for that unit. If you purchase the incorrect headset it will not link up with your base. We offer a 60 Day Money Back Guarantee.
A: The headset replacement is considered an accessory, it is not a commercial grade headset. (Only Commercial Grade Headsets carry the Plantronics 2yr Warranty) We offer our customers a 60 day money back guarantee if the item fails.