Plantronics Blackwire C710 (87505-02) UC headset. The Blackwire 700 Series is the versatile UC headset that offers high-quality PC audio and seamless Bluetooth connectivity to mobile phones and tablets...
Plantronics 86179-01 Spare convertible, DECT 6.0 headset for the CS540 - Includes battery, the microphone boom is black and Comes with soft black foam sock for added comfort and stability behind the ear