Plantronics legendary CS family is setting a new wireless standard for desk phone communication with the CS500 Series, which features the lightest DECT headset on the market, a new streamlined design and improved performance. Go mobile and multi-task up to 350 feet (100 meters) from your desk with answer, end and mute controls at your fingertips. And no matter what your preference, with three wearing choices there's one to match your personal style. Enjoy the sleek contemporary design of the new system, premium wideband audio quality and wireless mobility, all with the same reliability for hands-free productivity that has made the CS family a best seller for nearly a decade. With the new CS500 Series we are raising the bar once again for desk phone headset systems. *The CS540 replaces the discontinued CS55.