This is a Plantronics Spare headset for CS520 and W720 wireless headset systems can not only be used as a replacement, but can also be used as an additional headset on an existing system. You can add up to 3 additional headsets by simply docking them on the base to pair them for quick and easy collaboration.
Plantronics legendary CS family is setting a wireless standard for desk phone communication with the CS500 Series. The system features the lightest DECT headset on the market, a streamlined design and improved performance all with the same reliability for hands-free productivity.