Intelligent digital adapter for Poly QD headsets. Adapter type: Adapter. USB-A / USB-C - QD. Base color: Black. Fully backward compatible with any Poly QD headset. Smart headset detection. Do you want your call center employees to sound crystal clear from home or the office? The USB-A and USB-C compatible digital adapters from the Poly DA series adjust the sound to each specific Poly headset, providing top-notch call quality. You even get full access to everything Microsoft Teams has to offer. This level of flexibility and quality could only come from Poly. Supporting hybrid work with connections to both new and old Poly devices. Protect your investments in current and older technologies with the Poly DA75 and DA85. These digital adapters not only feature a USB-A and USB-C connection directly on the cable but are also backward compatible with all new and older Poly headsets and accessories. Better audio quality, durability, and user-friendliness. Clear calls are not just a dream. The Poly DA series offers smart headset detection that dynamically adjusts audio performance to your headset. Stay distraction-free with the DA75 or use the clearly displayed, recessed buttons to hold or answer calls on the DA85. Additionally, there is a handy audio/video hold button.