Plantronics EncorePro HW710D digital series 6-pin headset offers super comfort and super audio.  The Plantronics EncorePro HW710D headset delivers optimal digial sound to office and call center professionals. The EncorePro 700 series is built with premium lightweight nylon composite materials providing an lightweight design. Soft leatherette ear pads provide all-day comfort, and the reinforced, lightweight headband provides strength and durability. A re-tractable microphone for precise positioning in front of your mouth. Plantronics HW710D EncorePro 700 digital series ensures crystal-clear, efficient customer communications - with an elegant satin finish and featherweight design.

Key Features:

• Important:  Compatible with 6-pin devices such as Plantronics MDA526 amplifier,  Plantronics 6-pin DA90 Audio processor  and Plantronics MDA490 only call us you're not sure)
• Lightweight nylon composite materials provide an ultra-lightweight design and durability
• Retractable microphone ensures precise microphone positioning
• Noise-canceling microphone means customers never miss a word
• Low-sitting microphone arm stays clear of wearers’ peripheral vision
• Stylish design provides an appealing and subtle visual profile
• Soft leatherette ear cushions
• High-frequency wideband support ensures crystal clarity during customer conversations 

Old Poly part # 78715-101

New HP part # 783N6AA

Important Note: Not compatible with the traditional 4-pin Quick Disonnect devices call 877-999-3838 for assistance.

For more detail information see Plantronics HW710D datasheet 

Optional accessories for the Plantronics HW710D:

Plantronics Clothing Clip for SupraPlus, Encore Pro Headsets

Plantronics EncorePro HW710, HW291N Leatherette Ear Cushions

Plantronics EncorePro HW710, HW291N Foam Ear Cushions

Plantronics EncorePro Headband Support Pad