Poly Blackwire 5210 Monaural USB-C Headset +3.5mm Plug +USB-C/A Adapter (Bulk) 8X230A6 Push-to-Talk For use with Desk phone

For use with Desk phone

The convertible Plantronics CS540 & CS540 bundle provides superior call management and easy collaboration of multiple headsets

Its volume and automatic gain controls let you adjust incoming calls to a listening level that's comfortable for you

Wireless headset

The 32mm speaker driver delivers super wideband audio that captures a broader frequency range

Poly Blackwire 5210 Monaural USB-C Headset +3.5mm Plug +USB-C/A Adapter (Bulk) 8X230A6 Push-to-Talk For use with Desk phoneEffectively cancels outside noise to eliminate distortion with maximum sound efficiency Synthetic Leather ear cushion material to offer great versatility and allow creativity and innovation in design and construction The headset provides plenty of freedom with wired connectivity On ear earpiece design ensures maximum comfort and pain, fatigue free listening Call Answer End earpiece control for enhanced, dependable pointing efficiency with maximum