The Plantronics CS540 (C054) wireless DECT headset system is a must-have peripheral for any office with staff that spend time fielding calls while away from there desk. This convertible headset features three wearing styles for high levels of personal comfort, features an extended boom and noise-canceling headphone, has inline volume/mute controls, and uses DECT 6.0 technology to provide enhanced digital signal processing for crystal clear calls – all while weighing 21 grams! The Plantronics (now Poly) CS540 offers 7 hours talk time on a single charge. Add the optional HL10 handset lifter or Electric Hookswitch cable (EHS) allows users to remotely answer and end phone calls while away from their deskphone. New Plantronics CS540 units include a 1-year warranty, while refurbished comes with our standard 90-day warranty.