Check the listing for details. Plantronics C054 DECT 6.0 CS Series Wireless Wideband Headset System Earpiece. Color: Black, Condition: Used. Listed at 38.99 USD. Enjoy crystal-clear audio quality with the Plantronics C054 DECT 6.0 CS Series Wireless Wideband Headset System Earpiece. This wireless headset is designed with Bluetooth technology for easy connectivity and a Proprietary connectivity feature. The Ear-hook design ensures that the headset stays in place, while the Single earpiece allows you to answer calls without any interruptions. The black Plantronics CS540 headset has a sleek and modern design, making it perfect for any home or office. The headset is manufactured in Mexico and comes with a number of features, including wireless technology and an easy-to-use interface. Get your hands on this high-quality headset today and experience the ultimate in audio clarity.