The Polycom Compatible Plantronics Encore HW301N (HW720) Direct Connect Mono Headset Bundle with Telephone Interface Cable delivers enhanced performance and exceptional value for office and contact center use. It's the cost-effective noise-canceling headset that doesn't compromise on quality. Just plug this headset into the headset jack on your Polycom phone and your are ready for handsfree usage. The Plantronics HW720 is Polycom compatible and is the gold standard in performance and comfort. The EncorePro HW720 features Plantronics wideband capability and ultra noise-canceling microphone with extended boom for industry-leading background noise reduction and echo performance. NOTE: This headset is intended for usage on Polycom phone with a modular RJ-9/RJ-22 headset jack. Not intended for usage with Polycom phones with a round "pin" headset jack. The included Polycom Telephone Interface cable plugs the headset directly into the Headset jack on the bottom of the Polycom phone. Bundle includes: Item A- Plantronics HW720 Headset and Item B- Ergonomic Polycom Telephone Interface cable