Plantronics HW720-POLY Polycom IP Phone Compatible Headset.  HW720-POLY is a Binaural (double-ear) headset that also the top-of-the-line model that offers comfort with superior audio quality.  The Plantronics HW720-POLY headset delivers style and performance to office and call center workers to your Polycom IP Phones. Premium lightweight materials and leatherette ear pads provide all-day comfort. A precision-fit, noise-canceling microphone and wideband response ensure crystal-clear customer communications.

Certified for Polycom Soundpoint IP phone models: 300, 301, 335, 430, 450, 500, 501, 550, 560, 600, 601, 650, 670, CX300, CX500, CX600, CX700, VVX 101, VVX 201 VVX 300, VVX 310, VVX 400, VVX 410, VVX 500, VVX 600, VVX 1500, VVX 150, VVX 250, VVX 350, VVX 450

Key Features:

• Includes a Polycom certified RJ-9 10ft adapter cable - connects directly to the "headset" jack of your Polycom phone.  No additional cable or adapter needed.
• Binaural Style (covering both ears)
• Reinforced, lightweight headband provides strength and durability
• Telescoping microphone ensures precise mic position
• Noise-canceling microphone means customers never miss a word
• Slim, stylish design provides an appealing and subtle visual profile
• Soft  leatherette pads
• High-frequency wideband support ensures crystal clarity during customer conversations
• High-frequency wideband support prevents repeats and improves customer response
• Quick Disconnect™ feature ensures mobility within the work environment.

For more detail information see Plantronics EncorePro HW720 datasheet

Accessories for the HW720-POLY:

Plantronics Clothing Clip for SupraPlus, Encore Pro Headsets

Plantronics EncorePro HW720 Leatherette Ear Cushions

Plantronics EncorePro HW720 Foam Ear Cushions

Plantronics EncorePro Headband Support Pad