
Poly DA85 UC USB to QD Adapter, Inline Controls, USB-A/USB-C
Fast nationwide delivery in 2–4 working days.
Protected by a full 2-year warranty.
Description
QD (4-pin) to USB | USB-A and USB-C | Inline controls
The Poly DA85 UC is a USB-to-QD audio processor with inline controls. It connects a Poly or Plantronics Quick Disconnect (QD) headset to a computer and adjusts the audio to the headset model connected.
Key features
- Connects QD to PC: Use your QD headset with a computer over USB.
- Inline controls: Recessed buttons on the adapter so they are not pressed by accident.
- USB-A and USB-C: Works with both port types (per supplier and manufacturer data).
Fits these headsets we sell
- Poly EncorePro 310 QD (77T43AA)
- Poly EncorePro 510 QD (783Q2AA)
- Poly EncorePro 720 QD (8R707AA)
- Other Poly / Plantronics 4-pin QD headsets
Specifications
| Specification | Detail |
|---|---|
| Manufacturer part number | 786C7AA |
| Headset connector | QD, 4-pin |
| Computer connector | USB-A and USB-C |
| Controls | Inline |
| Version | UC |
| Colour | Black |
Versions and part numbers
| Part number | Version | Sold by us |
|---|---|---|
| 786C6AA | DA75 (no controls) | Yes |
| 786C7AA | DA85 UC | Yes: this listing |
| 786C8AA | DA85-M (Microsoft Teams) | Not sold by us |
What's in the box
- 1 x Poly DA85 UC adapter
FAQ
Which headsets does it fit?
Poly and Plantronics headsets with a 4-pin QD connector, such as the EncorePro 310, 510 and 720 QD models.
Is there a Teams version?
Yes, the DA85-M (786C8AA). We do not list it at the moment.
Part number: HP Poly 786C7AA
Key Specifications
What Makes It Stand Out

Poly DA85 UC USB to QD Adapter, Inline Controls, USB-A/USB-C
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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