Plantronics is a trusted brand and a leading provider of business-class wireless headset systems. Plantronics Wireless Headset Systems such as the CS55, CS540, Savi W740 and many more are compatible with most desktop phones, allowing you to benefit from handsfree communication throughout the day. Some of the top features Plantronics has to offer is DECT 6.0 technology which utilizes a frequency of 1.9GHz, and helps prevent interference by other wireless devices. Dotcom Computers sells a variety of refurbished and new Plantronics headsets. All headsets sold include a standard warranty.