Plantronics 69700-06 CS55 Convertible Monaural Wireless Headset (Refurbished)The Plantronics CS55 wireless headset system takes a combination of the traditional corded phone technology with the mobility of wireless telephone technology. Employees now have the technology of this headset to move around their office, to wherever their business takes them without interrupting or missing a call. Continuing as the tradition as a technology leader, Plantronics presents CS55 as the first headset in the United States to implement 1.