The Plantronics CS55 wireless headset system combines the clarity of traditional corded technology with the mobility of wireless, so employees can move around the office to wherever business takes them - without interrupting or missing a call. Continuing our tradition as a technology leader, Plantronics presents CS55 as the first headset in the United States to implement 1.9GHz UPCS voice-dedicated wireless technology. With the included Plantronics HL10 handset lifter, remotely taking or ending a call is as simple as pressing a button. Includes the Plantronics HL10 handset lifter for remote call answer/end capability.