HP Poly DA85-M Microsoft Teams Certified USB-A USB-C to Quick Disconnect AdapterThe Poly DA Series USB A and USB Type C digital adapters adjust audio to each specific Poly headset for quality calls, at home or in the office. Inline controls With just one simple click, you can instantly mute all audio and visual transmissions whether it's a phone call, a video conference, or a virtual meeting. Connection flexibility Answer soft phone calls from any PC, no matter what kind of USB port you have. Built in USB A and USB Type C